List Of Envelope Sizes & Types

If you need to mail a letter or another type of document, then you are going to need to find an envelope that is the appropriate size. Many different sizes of envelopes can be bought at the post office itself. Here is a brief rundown of all of the envelope sizes and types.

Envelope Sizing

1. Business and Correspondence Envelopes

Business and Correspondence Envelopes are commonly used to mail a wide variety of business and personal documents. These envelopes are ideal for machine insertion. Business and Correspondence Envelopes have a number of different flap options. These flap options include the commercial flap, the square flap, the wallet flap, the side seam, and the policy flap. You can find them in sizes from 3.5 x 6 inches to 6 x 12 inches.

2. Booklet Envelopes

Booklet Envelopes are larger in size than Business and Correspondence Envelopes, there frequently use for brochures, sales materials, annual report, and other documents that are larger in size and those that might be put into Business and Correspondence Envelopes. These envelopes have a side seam. They come in a variety of sizes, starting with 4.75 x 6.5 inches and going all the way to 10 x 13 inches.

3. Catalog Envelopes

Catalog Envelopes are one of the largest and most durable types of envelopes that are available on market. They’re specifically designed to be strong enough to carry the large weight of catalogs. In addition to catalogs, large booklets are also frequently mailed with Catalog Envelopes. These envelopes have a center seam which makes a lot stronger. Catalog Envelopes start out at sizes of 6 x 9 inches and go all the way to 12 x 15.5 inches.

4. Square Envelopes

As the name of suggest, Square Envelopes are square shaped. They are very distinct and easy to identify because of their unique shape. These envelopes require additional postage fees to be paid to use because they are non-standard. Like Catalog envelopes, they are also very strong. They come in many different sizes. The smallest Square Envelope that you can get is 5 x 5 inches. The largest is 9.5 x 9.5 inches.

5. Baronial Envelopes

Baronial Envelopes look somewhat similar to square envelopes. However, they are not a perfect square shape. Instead, they are more rectangular. They are made with a deep pointed flap and rectangular seams. These envelopes are frequently used for formal business announcements, wedding invitations, and greeting cards. If you would like to buy a Baronial Envelope, then you can buy them in a wide range of sizes, from 2.125 x 3.625 inches all the way to 5.5 x 7.75 inches.

6. Announcement Envelopes

Announcement Envelopes are also known as A-Style Envelopes. Items that are commonly shipped with Announcement Envelopes include photographs, stationery, small booklets, and greeting cards. So, if you need to ship any of these types of items, then Announcement Envelopes are an excellent choice for you. Announcement Envelopes come in many different sizes, ranging from 4.375 x 5.75 inches to 6 x 9.5 inches.


There are many different envelopes available on the market today. Ultimately the envelope that is best for you is going to be determined by the type of item that you need to ship and the shipping method that you use. If you have any questions about which type of envelope is the best for your delivery, then feel free to call the post office and ask them if they can give you a recommendation for the type of envelope that will be best for you. Most post office professionals will be able to give a perfect recommendation to you and their advice is generally very helpful.[/vc_column_text][/vc_column][/vc_row]

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