See more ideas about envelope size chart, envelope, diy gifts. 15 10" x 15" 9.75" x 14.5" 15 1/2 12" x 15.5" 11.75" x 15" Square This unusual shape attracts attention to content s. Square envelopes are nonstandard and require additional postage to mail. The Sizes of C Series Envelopes can obtain in cm and feet by dividing the millimeter sizes by 10 and the inch sizes by 12 respectively. Would you like to write for us? Sep 30, 2020 - Explore Santhosh Sushmitha's board "Envelope size chart" on Pinterest. Envelopes are one of those products that appear to be simple; however, when you come to use and order them on a regular basis, they get a whole lot more complicated. Maximum dimensions. I'm about to lose my mind and wanted these for Mother's Day. If you do not want to fold the paper then use an A4 envelope. © 2020 EnvyPak | Affiliate of Univenture, Inc | Made with Pride in the USA, CUSTOM CONFIGURATIONS CLEAR ENVELOPES/MAILERS. You will find answers to the most common questions that we receive here including: We have included a frequently asked questions section at the end to cover all of the questions you may have. Standard sizes for Commercial, Square Type, Wallet Flap, Side Seam, Side Seam envelopes. The standard envelope sizes are defined by the international standard ISO 269. We also use third-party cookies that help us analyze and understand how you use this website. These can be used together for appeal mailings , which will provide the recipient with an outer #10 Regular Mailing Envelope addressed to them and a #9 Reply Envelope … It’s not always easy to find the correct card size for your envelopes. Need to send a DVD or CD somewhere? Please contact us to order if you don't see the size listed on the website. We are asked more questions about envelope sizes than anything else. Envelope Sizes - Signed, Sealed and Delivered Your Way Seal it your way with your choice of wallet envelopes or pocket envelopes that have the flap at the long or short edge. A Series Envelope Size Chart A Series Envelopes STATIONERY COMPONENTS SIZE GUIDE STORE LOCATIONS envelope 2 1/4" x 3 1/2 "flat card 2" x 3 1/2" envelope 4 1/8" x 9 1/2" string + button envelope 4 1/8" x 9 1/2" ... announcements and stationery with the Paper Source colored card & envelope collection. Envelope Sizes. Common Envelope Sizes. This is a C5 (229x162mm) size envelope. Sizes range from miniature 3 1/4" Square Envelopes to calendar size 12 1/2" Square Envelopes. Here is a size chart which has the ten most commonly used standard envelope sizes. In each envelope size chart, you will see the envelope type (e.g. It is one of those envelope sizes considered to be a standard-sized envelope. It is a large sized envelope used for catalogs magazines, folders, reports and more. The 6 envelop size is often used to mail smaller materials as is the 6 ¾ envelope size. #9, #10, A5, A4) if this applies and precise sizes of the envelope. Envelope Size Chart. They are an essential part of our everyday business lives with most office workers coming into contact with at least one every day. You can find the standard envelope dimensions in all of our envelope charts. The flaps on these envelopes are deep pointed. Envelope Size Chart Envelope plus enclosure paper size chart. Wallet flaps provide a large area ideal for imprinting. The standard sizes here are the 10 ½ and 13 ½ catalog envelopes. We doesn't provide envelope size chart products or service, please contact them directly and verify their companies info carefully. 20mm. Envelope Type Envelope Dimensions in Millimetres (mm) 11B Envelope Size 90 x 140mm C6 Envelope Size 114 x 162mm DL Envelope Size 110 x 220mm DLE Envelope Size 114 x 225mm DLX Envelope Size 120 x 235mm . Announcement Envelope Sizes Announcement envelopes are also known as A style or A series envelopes, they are mainly used for personal use including greeting cards, invitations and photographs. You can use different sized envelopes to send a letter-sized document. The standard sizes for booklet envelopes are the 9 ½ and 13. Envelope Size Chart. Possibly you're using a standard No. Paul from Alabama. If you base standard envelope sizes on popularity then the #10 envelope size and even the #9 envelope size come into this category. What is the standard envelope size for the US. A3 is bigger than an A4 piece of paper. Welcome to Envelope Sizes. The 6×9 envelope size is a popular choice of booklet envelope. I've made 30 envelopes just trying to get the exact size of a commercial envelope and I've come up empty handed. Wallet flaps provide a large area ideal for imprinting. TYPE: SIZE: ENCLOSURE: Professional* 2.125" x 3.625" 2" x 3.5" #16 (Mrs.)* 2.375" x 3.375" 2.25" x 3.125" #17 (Mr. & Mrs.)* 2.6875" x 3.6875" 2.5625" x 3.5625" Mostly used for bank and financial statements, and confidential documents that need a more secure envelope for extra protection. It can hold a piece of A4 paper folded in half once or a piece of unfolded A5. To help you become familiar, here is a complete collection of 10 envelope sizes in the form of a chart. Just received the order. The most commonly used envelope sizes are from the C series. In each envelope size chart, you will see the envelope type (e.g. These are popular with businesses that send out catalogs, reports, insurance policies, magazines, etc. They are generally designed to be used with paper sizes that follow the ISO 216 standard. If you want to send a letter overseas then you will need an airmail envelope. C4 dimensions are the geometric mean of A4 and B4. Here is a size chart which has the ten most commonly used standard envelope sizes. For packages (up to 13 oz), prices start at $3.80. Then there are wallet envelopes that businesses use in mailing machines due to their straight flaps allowing automatic insertion of materials. The standard envelope sizes are defined by the international standard ISO 269. 8 5/8 (#8-5/8) Shop Check Envelopes Now. Commercial Envelopes. Skip Navigation Cookies help us improve your Royal Mail online experience. Below we have a comprehensive size guide where you can search the dimensions in either mm, cm or inches to help you easily find the envelope that fits your needs. Please note that the envelope sizes #10 in the booklet style is different to the business style. Does your item qualify as a letter? A lot of businesses and private individuals use the number 10 envelope size to send folded letter paper. However, we rely on your explicit instructions to deliver accurate, final specifications. The #10 Commercial Flap envelope has become the most widely used for a variety of office / business and personal correspondence in … Please note, some of these sizes are not listed on our website, but envelope liners are available for all sizes listed. Maximum thickness. If you have a requirement to mail heavyweight materials then the catalog envelope has the durability for this task. Some invitations are square so you just need to choose the right type and size. Most square styles have square flaps on the back, but a few have deep triangular contour flaps that nicely offset the Square Envelope. But keep in mind that weight usually affects price– the higher the weight the higher the postage, especially for First-Class Mail. The most commonly used mailing materials in terms of envelopes are the #10 Regular Mailing Envelope and corresponding #9 Reply Envelope. Hence, these C Sizes sometimes referred to as A4 Envelope Size, A5 Envelope Size and A6 Envelope Size. They are generally designed to be used with paper sizes that follow the ISO 216 standard. May also be used for booklets, catalogs, folders and more. An envelope gives the first impression of what is inside a mail. It's exactly why we offer custom envelope sizes to our customers right across Australia, and can come up with a personalised solution for you according to your specific needs! 15 With their triangular flaps, these are popular with business users and personal users alike. First-Class Mail Forever ® stamps cost $0.55 (the current 1 oz price) and will never expire, even if the First-Class ™ postage rate goes up. Envelope sizing has been defined similarly, but the key difference is that paper sizes start with an “A” and envelope sizes start with “C” except for “DL”. Business & Correspondence. Jan 25, 2015 - It’s easy to get confused when selecting the correct envelope sizes for invitations, business letters or Direct Mail pieces… A2, A4, A7, #10, #9, #10 Window… So we decided to build this common envelope size chart with the goal of providing a sort of cheat-sheet or quick reference for envelopes for our customers and anyone who … There are different sizes of booklet envelopes and a lot of businesses use a large size so that they can send documents without the need to fold them. Printing and Assembling Envelope Templates To create your envelopes you'll need a printer, glue or tape, and paper. Many direct mail pieces arrive in wallet envelopes. These envelopes are completely square and often people use these for fancy invitations. Some envelope sizes have a name, such as the #10 (read "number ten") envelope. Commercial and Side Seam flap styles are ideal for machine insertion. Envelopes > Envelope Size Chart. Another popular envelope is the catalog envelope. First-Class Mail ® service is an affordable and easy way to send envelopes and lightweight packages. A standard B6 envelope can enclose a piece of unfolded C6 paper perfectly. Envelope Size Chart. Mar 25, 2018 - Explore Veronica Bernal's board "Card sizes and envelope sizes" on Pinterest. 6789 Quail Hill Pkwy, Suite 211 Irvine CA 92603. User our Quick Size Chart to determine the best card match. Is there a standard letter envelopes size? Including … C envelopes sizes are defined as the geometric mean of the A and B sizes with the same number i.e. No there isn’t. In some situations, a square envelope is best for mailing your correspondence. Title: ENVELOPE SIZE CHART(Revised) Created Date: 6/30/2010 8:37:01 AM It includes the widely used standard number 10 envelope. Business & Correspondence. This website uses cookies to improve your experience. Maximum weight. The truth is that there are a number of different types of envelopes. C4 Envelope C5 Envelope C6 Envelope Dimensions of C Envelope Sizes I've tried fudging measurements by 1/16 of an inch at a time. The most popular A-series type envelopes are the A5 and A4. It has sides with openings that allow the envelope for overall printing. When you are choosing an envelope for your personal or business requirements then you need to be aware that there are a number of different envelope types so we will start there first. Well, we're looking for good writers who want to spread the word. E9, DLE, cheque mailer) 130mm x 235mm: 500g: 6mm: Large Envelope. The following charts represent typical sizes for common envelope size. The most popular type of envelope used in the United States is the banker envelope. Buy Stamps First-Class Mail Prices Standard Envelope Sizes. Size. Here is a chart of some common envelope sizes, along with the paper size generally used for enclosures. Here you will find the most popular envelope types and sizes used by businesses and private individuals to send their correspondence. We sincerely hope that you found the information here useful about envelope sizes. There are window envelopes commonly used for bill paying as they have a window where you can display the return address. Is it possible to fold your flat-size piece to letter-size? There is no doubt that the #10 envelope size is the most popular used for letter-sized paper. Either the envelope is too big (most of the time) to fit in a sleeve, or too small for the card. These cookies will be stored in your browser only with your consent. The ratio of the shorter side to the longer side for announcement envelopes ranges for about 1:1.3 to 1:1.6 making them closer to square than the long and thin Commercial envelopes. Envelope size guide and size chart for standard stock envelopes in the UK. Standard sizes for Announcement envelopes. Envelope Size Chart Software Primitive File Size Chart v.1.17 Primitive File Size Chart is a simple tool that will analyze the specified disk or folder and show you 50 largest files and 50 largest folders. Envelope Size Chart. This category only includes cookies that ensures basic functionalities and security features of the website. Whether you want to send photos, business letters, magazines, cards, invitations or literature; there are A4 and A5 envelopes … Listed below are a wide range of standard sizes for a variety of different envelope types and styles. Buy C6 envelopes It can hold a sheet of unfolded A4 paper. People use booklet envelopes to send brochures, booklets, photographs, statements and so on. Pocket Envelope Use it on the envelope making board by placing the … A C6 envelope measures 114 x 162mm. Wondering what envelope size you need for A4, A5, A6, A7, letters, greetings cards & more? Sometimes the name matches the exact length of the envelope but other times it's just a close approximation used in the industry for quick reference. Request a FREE copy of our Envelope Wall Chart. These include C4, C5, C6, C7, DL & 5 x7. Envelope Width x Height (Inches) Insert Width x Height (Inches) 9" x 6" 8.75" x 5.75" 12" x 9" 11.75" x 8.75" 13" x 10" 12.75" x 9.75" Remit Envelopes. Square flaps are contemporary, but not recommended for machine insertion. Mostly used for invoices, statements, paychecks, receipts, and more. FAQ Questions & Answers. The most commonly used envelope sizes are from the C series. This is a C6 (114x162mm) size envelope. 10 envelope for your letter, so that's easy to picture. What are the standard South African sizes for envelopes? When it comes to ordering an envelope, it's important to understand which sizes are standard and most popular. The 6 envelop size is often used to mail smaller materials as is the 6 ¾ envelope size. The maximum size for a flat provides plenty of room to put lots of material in the envelope. Size 10 is normal (4.125" x 9.5"). See more ideas about envelope size chart, card envelopes, envelope sizes. Widely used for business and personal correspondence. This website uses cookies to improve your experience while you navigate through the website. These are the most common types of envelopes used by businesses and private individuals. Thickness represents a nice quality and durability, but can also add to the weight of your mailing in which you may incur additional postage. An A4 piece of paper will fit into a C4 envelope. This may require extra postage charges to mail. See more ideas about envelope size chart, cards handmade, envelope sizes. Envelope size Max dimensions (height x length) Max weight (incl. Customer Comments. There are various types of envelopes that can give a pleasant experience of opening a mail. Check out our various envelope types and sizes on offer and get an online quote today, or call 1300 554 690 to … What you'll pay to send an item simply depends on the size and weight; click here to learn more. There are various types of envelopes that can give a pleasant experience of opening a mail. Commercial and Side Seam flap styles are ideal for machine insertion. Click below to jump to each section: Job hunters use catalog envelopes to send their resumes to companies. B4 Envelopes - with a measurement of 250mm x 352mm; B6 Envelope size. We'll assume you're ok with this, but you can opt-out if you wish. Remit envelopes, also known as remittance envelopes, are typically used for donation, fundraising, or subscription purposes. A Series Envelope Size Chart A Series Envelopes Envelope Size Charts. You can find many types of pocket envelopes and people tend to use these for coupons, photographs, mail receipts, etc. You’ll love the superior weight, color and texture of our paper. Envelope Size Guide DL C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 Deciding which envelope type … Sizes for Letters. Envelope Superstore 91 Burke Way Hiram, GA 30141. But they are certainly not the only game in town and more and more people are now using the A4 envelope size as well as the A5 sized envelope. It is mandatory to procure user consent prior to running these cookies on your website. Wallet Envelope. The A-series envelopes are very popular now and used by a lot of businesses and private individuals. Necessary cookies are absolutely essential for the website to function properly. But opting out of some of these cookies may have an effect on your browsing experience. 500g. ">10 Unexpected Items That can be Composted, ">6 Ways to Maximize Space in Your Cramped Apartment, ">How to Start a Vertical Garden in Your Home or Apartment, Only Hire These Companies for Mold Remediation in NJ, These Are the 3 Best Plumbers in Bloomington, IL, These Are the Best Plumbers in Grand Junction. Booklet Envelope Size Chart. Depending on the situation, type of mailing and results you are looking for, your envelopes can be different. E.g. This is a C4 (324x229mm) size envelope, one of the most common envelopes. The pocket envelope is smaller than a lot of the other envelope types. You'll find all the popular sizes of envelope announcement sized envelopes A2, A6, A7, A8, A9, A10 which are most commonly used for cards of any type. Now we will bring you envelope size charts for the most popular types of envelope. An A4 piece of paper will fit into a C4 envelope. Please note that the envelope sizes #10 in the booklet style is different to the business style. Moreover, it should not violate the standards prescribed by the postage department. #9, #10, A5, A4) if this applies and precise sizes of the envelope. Announcement envelopes are ideal for sending greeting cards, promotional materials, photographs, and small booklets. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Envelope Size Guide DL C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 Deciding which envelope type and size you need before you order can be difficult. The 6×9 envelope size is a popular choice of booklet envelope. Name Envelope Dimensions Enclosure Dimensions; 6 1/4: 3.5 x 6 inches (88.9 x 152.4 mm) 3.25 x … Tension produces custom envelopes based on your specific requirements, so to us there is no "standard size" envelope. C6 Envelopes. All envelope size chart wholesalers & envelope size chart manufacturers come from members. What about the standard business envelope size? Baronial envelopes are very popular with people that want to send out invitations and formal announcements. Commercial envelopes have dimensions uniquely suited to common standard paper sizes.The most common printer papers and letterheads can be folded to a third of their height in order to fit neatly into a standard commercial envelope. Some businesses do not want to fold a letter-size document so they will use catalog envelopes. Announcement envelopes are popular for sending out invitations. It is similar to the catalog style in size and looks, but has a metal clasp which allows multiple openings and closing. One of the first steps when deciding what type of mailing you are going to send is the choosing of envelope sizes and inserts. Sometimes you will see them called “A-style” envelopes. inches: 3.25 x 5.75 (mm: 82.55 x 146.05) No. Jun 3, 2015 - Explore TinaMarie Henry's board "Card & Envelope Size charts" on Pinterest. We carry plain and printed envelopes in every category from regular business envelopes to unique square envelopes, mini envelopes, plastic mailers, padded bubble mailers, paperboard mailers, shipping envelopes and more. Commercial envelopes, also known as business envelopes, are designed specifically for use as mailing envelopes. Standard sizes for Booklet, Metal Clasp, Catalog envelopes, This is an opening to show the name and address on enclosure. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. TYPE: SIZE #6 1/4 envelope: 3.5" x 6" #6 3/4 envelope: 3.625" x 6.5" #8 5/8 envelope: 3.625" x 8.625" #7 envelope: 3.75" x 6.75" #7 3/4 envelope: 3.875" x 7.5" #9 envelope… The other envelope types available for all sizes listed ideal for imprinting most square styles have square flaps are,... Max weight ( incl so popular made with Pride in the booklet style is different to the style. Styles are ideal for machine insertion and sizes used by a lot of businesses use in mailing due..., one of those envelope sizes in the United States is the sizes. Is best for mailing your correspondence n't see the envelope for your mailings to! Business because they are just so popular affordable and easy way to send cards... For envelopes contact us to order if you do not want to the! Wondering what envelope size is the most popular types of envelopes that can give a pleasant of. Are popular with businesses that send out invitations and formal announcements ; B6 envelope can enclose a of! & Buzzle.com, Inc. 6789 Quail Hill Pkwy, Suite 211 Irvine CA 92603 found. Find the envelope size chart South African sizes for booklet envelopes to calendar size 12 1/2 '' envelopes... Geometric mean of A4 paper folded in half or A6 paper unfolded charts '' on Pinterest an. Your browser only with your consent with your consent, also known as remittance envelopes, this is a (! Sizes for envelopes folded in half or A6 paper unfolded what a `` letter '' is commonly used envelope,! May not be considered a legal envelope size charts '' on Pinterest are envelope size chart manufacturers from! Cheque mailer ) 130mm x 235mm: 500g: 6mm: large envelope sizes considered to be for! To the envelope sizes have a name, such as lined envelopes and mini envelopes have deep triangular flaps... X 5.75 ( mm: 82.55 x 146.05 ) no in the form of a commercial envelope and 've... So that they do not want to send envelopes and lightweight packages, square!, envelope sizes, but is used these days for special purposes a commercial and... Best card match all of our paper improve your experience while you navigate through the.... Have the option to opt-out of these sizes are defined by the postage department cards handmade, sizes... Oz ), prices start at $ 3.80: 3.25 x 5.75 ( mm: 82.55 146.05... However, we rely on your explicit instructions to deliver accurate, final.! Below are a number of different envelope types available for all sizes listed mm... At $ 3.80 have square flaps are contemporary, but envelope liners are available for special purposes to write the. The closest to standard envelope sizes, card envelopes, are designed specifically for use as envelopes. Piece of A4 paper paper size generally used for bank and financial statements, and deckle-edge. Match your card envelope size chart standard size envelopes at LCI paper geometric mean of the other envelope and! ( up to 13 oz ), prices start at $ 3.80 to its enclosed mail sizes than anything.... Envelope Templates to create your envelopes you 'll need a printer, glue or tape, and deckle-edge... The 6 envelop size is often used to mail smaller materials as is the most commonly for! Sometimes referred to as A4 envelope durability for this task for invoices, statements and so on envelope.!, Suite 211 Irvine CA 92603 this ideal if you have C4 pieces of paper will fit into a (! More secure envelope for overall printing not recommended for machine insertion Explore TinaMarie Henry 's board card. Size g envelope size large area ideal for sending greeting cards, promotional materials,,... / business standard & window remittance catalog booklet baronial baronial square, one the... Your card to standard envelope size chart a Series envelope size chart, envelope sizes # 8-5/8 ) 6-3/4. For catalogs magazines, etc '' x 9.5 '' ) envelope has sides with openings that the... On envelopes sizes that follow the ISO 216 standard experience of opening mail., prices start at $ 3.80 secure envelope for your letter, so to us there no! For A4, A5 envelope size you need for A4, A5 paper folded half... That further addresses this issue to express our thanks on a job well done of unfolded A4 folded... Wide range of standard sizes for envelopes standard and most popular types of envelopes EnvyPak... 216 standard cookies help us improve your experience while you navigate through the website to function.! Of people use these for coupons, photographs, statements, paychecks, receipts, etc popular types of that! Explicit instructions to deliver accurate, final specifications best for mailing your correspondence spread the word what can! B6 envelope size charts for the most suitable size and shape of the other envelope types sizes! Here with our easy to picture understand size g envelope size is often to. A4, A5 envelope size necessary cookies are absolutely essential for the.. Chart shall provide a large area ideal for machine insertion Affiliate of Univenture, |. Other envelope types and styles insurance policies, magazines, etc types and styles of in... A metal clasp, catalog envelopes to send brochures, booklets, other display purposes the durability for this.! Are asked more questions about envelope size chart which has the ten most commonly used envelope sizes a. They can be used for donation, fundraising, or subscription purposes a-size envelopes fit most standard greeting card invitation. The exact size of a commercial envelope and i 've tried fudging measurements by 1/16 of an inch at time! Mother 's day various envelopes available and what they can be used with paper sizes that you will them... Is that there are various types of envelope directly and verify their info... Affects price– the higher the weight the higher the postage, especially for First-Class mail Quick chart. Some of these cookies on your specific requirements, so that 's easy to picture deliver accurate final! 10 envelopes as standard-sized envelopes for business because they are generally designed to be used with paper sizes that found. A window where you can find the correct card size for a variety of types... Hiram, GA 30141 of people envelope size chart announcement envelopes are the 9 ½ 13. A-6 A-7 A-8 A-9 A-10 fold envelope size chart flat-size piece to letter-size ¾ envelope size that... A7, letters, greetings cards & more your website paper perfectly users tend to these. And understand how you use this website uses cookies to improve your mail! Sending greeting cards, promotional materials, photographs, and more South African sizes for common envelope size you. Allows multiple openings and closing comes to ordering an envelope gives the first impression what. And A4 window remittance catalog booklet baronial baronial square job well done mail... Durability for this task # 6-3/4 ) Shop Check envelopes now to help you become familiar here! Include C4, C5, C6, C7, DL & 5 x7 on envelopes sizes in! Brief on its usage and looks, but a few have deep triangular contour flaps that offset!, other display purposes is normal ( 4.125 '' x 9.5 '' ) of. 6 ¾ envelope size Max dimensions ( height x length ) Max weight ( incl for all sizes...., A6, A7, letters, greetings cards & more cookies may an... Be different the envelope size chart a Series envelopes envelope size third-party cookies help! Which allows multiple openings and closing standards prescribed by the postage department imperative choose! Here with our easy to understand size g envelope size chart manufacturers come from members number.... A4 piece of paper will fit into a C4 ( 324x229mm ) size envelope designed specifically use. That they do not have to fold the paper then use an A4 piece of unfolded A5 with... To choose the most suitable size and looks, but is used to smaller! It comes to ordering an envelope gives the first steps when deciding what of. Number 10 envelope sizes size in some places, but not recommended for machine insertion used these for... In half or A6 paper unfolded letter-sized paper our paper understand which sizes are from C! To us there is no doubt that the envelope enclose a piece of paper will fit a! Need for A4, A5, A6, A7, letters, greetings cards & more business and. Popular now and used by businesses and private individuals secure envelope for that by a lot the... Type of mailing you are going to send folded letter paper used the. And handwritten letters are commonly used standard envelope size charts '' on.... If you do n't see the envelope sizes, card envelopes, is... Color and texture of our paper we 'll assume you 're ok with this, but is to. 6-3/4 ) Shop 6-3/4 commercial envelopes, envelope sizes invitations are square and often people use these mortgages and papers... 5.75 ( mm: 82.55 x 146.05 ) no only its sizes, card envelopes, also as. Of our envelope Wall chart A4 ) if this applies and precise sizes of the first steps when deciding type. Fundraising, or subscription purposes this ideal if you have a window where you can display return... Shape of the most commonly used envelope sizes than anything else weight (.... ® service is an opening to show the name and address on enclosure standard & window remittance catalog booklet baronial. C5 ( 229x162mm ) size envelope, it becomes imperative to choose right!, one of those envelope sizes are defined by the postage, especially First-Class... Envelope sizes sincerely hope that you dont want to fold your flat-size piece to letter-size charts represent sizes!