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Commercial Envelopes

Common Commercial Envelope Sizes and Enclosure Dimensions

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Used for business, direct-mail, and personal correspondence and direct-mail style envelopes, the commercial envelope style includes the standard, readily available #10 envelope.
Commercial Envelope Sizes and Enclosure Dimensions

The #10 commercial envelope is the most popular size for business and personal correspondence.

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Also called business, standard, or officials, commercial envelopes are open side envelopes usually with commercial style flaps and diagonal seams although some sizes come with side seams and square/wallet or pointed flaps. The Monarch is a variation of the #7 ¾ envelope but with pointed flap. The window version has single or double windows that allow addresses to show through the face of the envelope. They are normally used for invoices or billing statements, paychecks and receipts.
Compare prices on and buy commercial style envelopes in various sizes and colors.

The following list shows the name/number designation, envelope dimensions, and approximate maximum enclosure dimensions for some of the more common sizes of this envelope style. Actual dimensions for enclosures will depend on the thickness of the enclosure (paper thickness, number of pages).

#5
5.5 x 3.0625
5.25 x 2.8125

#6
6 x 3.375
5.75 x 3.125

#6 ¼
6 x 3.5
5.75 x 3.25

#6 ½
6.25 x 3.5625
6 x 3.3125

#6 ¾ [compare prices]
6.5 x 3.625
6.25 x 3.5

#7
6.75 x 3.75
6.5 x 3.5

#7 ½
7.625 x 3.75
7.375 x 3.5

#7 ¾ & Monarch [compare prices]
7.5 x 3.875
7.25 x 3.75

Check
8.625 x 3.625
8.375 x 3.5

#9
8.875 x 3.875
8.625 x 3.75

#10 [compare prices]
9.5 x 4.125
9.25 x 3.875

#10 ½
9.5 x 4.5
9.25 x 4.25

#11
10.375 x 4.5
10.125 x 4.25

#12
11 x 4.75
10.75 x 4.5

#14
11.5 x 5
11.25 x 4.75

#16
12 x 6
11.75 x 5.75

All measurements in inches: .125 = 1/8 | .25 = 1/4 | .375 = 3/8 | .5 = 1/2 | .625 = 5/8 | .875 = 7/8
These commercial envelope sizes apply specifically to the United States. Standard International envelope sizes differ.

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