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envelope size charts

Envelope Size Charts: Your Complete Guide To Envelope Sizes

We are asked more questions about envelope sizes than anything else. So here we will provide the most complete guide on envelopes sizes that you will find anywhere. Also included, are envelope size charts that further addresses this issue. You will find answers to the most common questions that we receive here including:

  • What is the standard envelope size for the US?
  • What is a business size envelope?
  • What is the standard envelope size?
  • What is a #10 envelope?
  • What size is a #9 envelope?
  • What are invitation envelope sizes?
  • What is the A4 envelope size?

We have included a frequently asked questions section at the end to cover all of the questions you may have. 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.

The Different Types of Envelopes

The truth is that there are a number of different types of envelopes. There are window envelopes commonly used for bill paying as they have a window where you can display the return address. This saves on having to write out the address.

If you want to send a letter overseas then you will need an airmail envelope. Need to send a DVD or CD somewhere? Well, you can get a special disc envelope for that. The most popular type of envelope used in the United States is the banker envelope. With their triangular flaps, these are popular with business users and personal users alike.

The pocket envelope is smaller than a lot of the other envelope types. You can find many types of pocket envelopes and people tend to use these for coupons, photographs, mail receipts, etc.

Announcement envelopes are popular for sending out invitations. Baronial envelopes are for announcements and a lot of people use these. People use announcement envelopes to send greetings cards, small booklets and brochures as well as invitations.

Another envelope type is the square envelope. These envelopes are completely square and often people use these for fancy invitations. Then there are wallet envelopes that businesses use in mailing machines due to their straight flaps allowing automatic insertion of materials. Many direct mail pieces arrive in wallet envelopes.

People use booklet envelopes to send brochures, booklets, photographs, statements and so on. 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.

Another popular envelope is the catalog envelope. These are popular with businesses that send out catalogs, reports, insurance policies, magazines, etc. Job hunters use catalog envelopes to send their resumes to companies. Users tend to go with a larger size catalog envelope so that they do not have to fold the materials inside it.

These are the most common types of envelopes used by businesses and private individuals. There are other envelope types available for special applications such as lined envelopes and mini envelopes.

envelope size charts

Letter Size Envelopes and Standard Envelope Sizes

Is there a standard letter envelopes size? No there isn’t. Letter paper used in the United States is 8.5 inches by 11 inches. You can use different sized envelopes to send a letter-sized document.

A lot of businesses and private individuals use the number 10 envelope size to send folded letter paper. Some businesses do not want to fold a letter-size document so they will use catalog envelopes.

There is no doubt that the #10 envelope size is the most popular used for letter-sized paper. It is one of those envelope sizes considered to be a standard-sized envelope. While there is really no standard size envelope or standard envelopes 10 size is probably the closest to standard envelope size.

What about the standard business envelope size? Well, again you are looking at size 10 envelopes as standard-sized envelopes for business because they are just so popular. So to answer the question “what size is a standard envelope?’ there isn’t really a regular envelope size or standard envelope dimensions.

If you base standard envelope sizes on popularity then the #10 envelope size and even the #9 envelope size come into this category. 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.

envelope size charts

Envelope Size Charts

Now we will bring you envelope size charts for the most popular types of envelope. In each envelope size chart, you will see the envelope type (e.g. #9, #10, A5, A4) if this applies and precise sizes of the envelope. You can find the standard envelope dimensions in all of our envelope charts.

Business and Personal Correspondence Envelopes Chart

Here you will find the most popular envelope types and sizes used by businesses and private individuals to send their correspondence.

Envelope Type Envelope Size
6 ¼ 3.5 inches by 6 inches
6 ¾ 3.625 inches by 6.5 inches
8 5/8 3.625 inches by 8.625 inches
7 3.75 inches by 6.75 inches
7 ¾ (Monarch) 3.875 inches by 7.5 inches
9 3.875 inches by 8.875 inches
9 (for policies) 4 inches by 9 inches
10 4.125 inches by 9.5 inches
DL 4.313 inches by 8.625 inches
11 4.5 inches by 10.375 inches
12 4.75 inches by 11 inches
14 5 inches by 11.5 inches
16 6 inches by 12 inches

 

The #10 envelope size is considered to be the standard business envelope size and the #9 envelope size the standard reply envelope size.

Catalog Envelopes Chart

If you have a requirement to mail heavyweight materials then the catalog envelope has the durability for this task.

Envelope Type Envelope Size
1 6 inches by 9 inches
1 ¾ 6.5 inches by 9.5 inches
3 7 inches by 10 inches
6 7.5 inches by 10.5 inches
8 8.25 inches by 11.25 inches
9 ¾ 8.75 inches by 11.25 inches
10 ½ 9 inches by 12 inches
12 ½ 9.5 inches by 12.5 inches
13 ½ 10 inches by 13 inches
14 ½ 11.5 inches by 14.5 inches
15 10 inches by 15 inches
15 ½ 12 inches by 15.5 inches

The standard sizes here are the 10 ½ and 13 ½ catalog envelopes.

 

Booklet Envelopes Chart

A lot of businesses use booklet envelopes to send brochures, sales materials, annual reports and so on.

Envelope Type Envelope Size
3 4.75 inches by 6.5 inches
4 ½ 5.5 inches by 7.5 inches
5 5.5 inches by 8.125 inches
6 5.75 inches by 8.875 inches
6 ½ 6 inches by 9 inches
6 5/8 6 inches by 9.5 inches
6 ¾ 6.5 inches by 9.5 inches
7 ¼ 7 inches by 10 inches
7 ½ 7.5 inches by 10.5 inches
9 9.75 inches by 11.5 inches
9 ½ 9 inches by 12 inches
10 9.5 inches by 12.625 inches
13 10 inches by 13 inches

The standard sizes for booklet envelopes are the 9 ½ and 13.

 

Announcement Envelopes Chart

Announcement envelopes are ideal for sending greeting cards, promotional materials, photographs, and small booklets. Sometimes you will see them called “A-style” envelopes.

Envelope Type Envelope Size
A2 4.375 inches by 5.75 inches
A6 4.75 inches by 6.5 inches
A7 5.25 inches by 7.25 inches
A8 5.5 inches by 8.125 inches
A9 5.75 inches by 8.875 inches
A10 6 inches by 9.5 inches

 

Baronial Envelopes Chart

Baronial envelopes are very popular with people that want to send out invitations and formal announcements. The flaps on these envelopes are deep pointed.

Envelope Type Envelope Size
4 BAR 3.625 inches by 5.125 inches
5 ½ BAR 4.375 inches by 5.75 inches
6 BAR / Walton Outside 4.75 inches by 6.5 inches
Lee 5.25 inches by 7.25 inches
Professional 2.125 inches by 3.625 inches
Gladstone 3.563 inches by 5.562 inches
16 2.375 inches by 3.375 inches
17 2.6875 inches by 3.6875 inches
Monona Inside 5.25 inches by 7.5 inches
Monona Outside 5.5 inches by 7.75 inches

envelope size charts

Envelope Size Chart for A Series

The A-series envelopes are very popular now and used by a lot of businesses and private individuals. They conform to the globally recognized standard ISO 216.

Envelope Type Envelope Size
A0 33.1 inches by 46.8 inches
A1 23.4 inches by 33.1 inches
A2 16.5 inches by 23.4 inches
A3 11.7 inches by 16 ½ inches
A4 8.3 inches by 11.7 inches
A5 5.8 inches by 8.3 inches
A6 4.1 inches by 5.8 inches
A7 2.9 inches by 4.1 inches
A8 2 inches by 2.9 inches
A9 1.5 inches by 2 inches
A10 1 inch by 1.5 inches

The most popular A-series type envelopes are the A5 and A4. With A4 sized paper now used very often, you can fold an A4 sheet in half and it will fit perfectly into an A5 envelope. If you do not want to fold the paper then use an A4 envelope.

Square Envelopes Chart

In some situations, a square envelope is best for mailing your correspondence. Some invitations are square so you just need to choose the right type and size.

Envelope Type Envelope Size
5 Square 5 inches by 5 inches
5 ½ Square 5.5 inches by 5.5 inches
6 Square 6 inches by 6 inches
6 ½ Square 6.5 inches by 6.5 inches
7 Square 7 inches by 7 inches
7 ½ Square 7.5 inches by 7.5 inches
8 Square 8 inches by 8 inches
8 ½ Square 8.5 inches by 8.5 inches
9 Square 9 inches by 9 inches
9 ½ Square 9.5 inches by 9.5 inches

 

Frequently Asked Questions (FAQ)

We always receive a number of questions about envelope sizes so we have compiled a list of the most frequently asked to help you choose the right type and size of envelope for your mailing requirements.

  1. What is the standard envelope size for the US?
    There is not really a standard envelope size used in the United States although a lot of people refer to the number 10 envelope size as the standard. It is certainly the most popular and ideal for use with letter-size paper.
  2. What is a business size envelope?
    The closest answer to this is the #10 envelope size because businesses use it the most. In reality, businesses use a lot of different types and sizes of envelopes depending on their mailing needs.
  3. What is the standard envelope size?
    We have answered this above. There is no standard envelope size but the most commonly used are size 10 envelopes.
  4. What is a 10 envelope?
    The 10 envelope is used the most and it has dimensions of 9.5 inches by 12.625 inches.
  5. What size is a 9 envelope?
    The 9 envelope dimensions are 9.75 inches by 11.5 inches.
  6. What are invitation envelope sizes?
    There are several sizes for invitation envelopes. Do you want a square envelope or a baronial envelope? Please see the envelope charts above for these two types of envelope so that you can choose the size that you need.
  7. What is the A4 envelope size?
    A4 envelopes are now more popular than before. The size of an A4 envelope is 8.3 inches by 11.7 inches.
  8. What is the #9 envelope size?
    The number 9 envelopes size is popular and used a lot for replies. The #9 envelope dimensions are 9.75 inches by 11.5 inches.
  9. What is the A7 envelope size?
    A7 envelopes measure 2.9 inches by 4.1 inches.
  10. What is the A6 envelope size?
    The A6 envelope is 4.1 inches by 5.8 inches.
  11. What is the A10 envelope size?
    The size of the A10 envelope is 1 inch by 1.5 inches.
  12. What are the standard envelope sizes in the US?
    The most popular envelope sizes used in the US are number 10 and number 9 sizes.
  13. What are A7 size envelopes?
    An A7 envelope meets the standard requirements of ISO 216 and its dimensions are 2.9 inches by 4.1 inches.
  14. What A5 envelope sizes are there?
    The A5 envelope is a standard size which is 5.8 inches by 8.3 inches.
  15. What are the typical envelope sizes?
    We are assuming that typical means those that are used the most. So the answer to the question is the number 9 envelope and the number 10 envelope size.
  16. What is the 11 envelope size?
    The size of the #11 envelope is 4.5 inches by 10.375 inches.
  17. What is a small envelope size?
    There are a number of small envelope sizes such as the 6 ¼ and 6 ¾ and the A9 and A10 envelopes. Our advice here is to measure the size of the materials that you want to mail and then choose the most appropriate small size envelope from the envelope charts above.
  18. What is the #6 envelope size?
    The 6 envelope size is popular. A6 envelope dimensions are 5.75 inches by 8.875 inches.
  19. What size is a #9 envelope?
    We always get a lot of questions about the number 9 envelope size. The 9 envelope dimensions are 9.75 inches by 11.5 inches.

We sincerely hope that you found the information here useful about envelope sizes. Please refer to the envelope size charts here for the most accurate size details. Always use the right size of the envelope for your mailings.