Business Envelope Dimensions

The most widely used business envelope dimensions in the United States is the #10. It measures 4 1/8 x 9 1/2. This size has several options such as commercial flap, Policy, Flap and Square Flap. But there are many other sizes that you can use. Some of them are the following.

Commercial and Office Envelopes

The 6 1/4 envelope has dimensions of 3.5″ x 6″. The 6 3/4 type measures 3.625″ x 6.5″ while the 8 5/8 measures 3.625″ x 8.625″. The 7 type measures 3.75″ x 6.75″; the Monarch (7 3/4) is 3.875″ x 7.5″and the 9 is 3.875″ x 8.875″. The 9 (policy) measures 4″ x 9″ while the DL is 4.313″ x 8.625″. Envelope type 11 measures 4.5″ x 10.375″. Type 12 has dimensions of 4.75″ x 11″ and the 14 type size is 5″ x 11.5″. Type 16 is 6″ x 12″.


As the name suggests, these envelopes are used mainly for business and commerce. In spite of the popularity of email, writing a formal letter is often necessary in business. These envelopes are often used when communicating with suppliers, clients, creditors, customers and so on. It will also be used to carry solicitations, letters invoices or checks.

The same envelope is used as the means for prepaid postage. These business envelope dimensions typically are stamped by the company postage apparatus.


Envelopes for business purposes are white wove stock 24 lb. Document sheets are slightly lighter. They are also heavier than the paper employed for making wedding invites. These envelopes also come with a gummed flap. This is the part you open at the topmost area. Most of these envelopes have a window. This makes it possible for addresses to remain visible.

There are also envelopes with double windows so return addresses can be seen. Some of them have a blue tint. This is for security purposes; it produces opacity and keeps the contents private.

Other Information

The number 9 size is often placed in a number 10 envelope. When this is done, it means the number 9 is a reply envelope. The smaller business envelopes are frequently used for utility billing and credit cards. The bigger envelopes are used for storing several documents. The majority of these envelopes are white. But they are also available in brown, yellow, blue and other colors.

The business envelope dimensions mentioned above are frequently used in the office. However they can also be used for sending personal letters.

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