American Envelope Sizes

  • 2024-01-26
There are dozens of sizes of Envelopes available. Not all are used for posting mail, but for such things as former pay packets or putting a gift card or a key in.

Announcement Envelope Sizes






































Name Size in millimeters Size in inches
A-2 111 mm x 146 mm 4 3/8 in x 5 3/4 in
A-6 120 mm x 165 mm 4 3/4 in x 6 1/2 in
A-7 139 mm x 184 mm 5 1/4 in x 7 1/4 in
A-8 139 mm x 206 mm 5 1/2 in x 8 1/8 in
A-10 159 mm x 244 mm 6 1/4 in x 9 5/8 in
Slim 98 mm x 225 mm 3 7/8 in x 8 7/8 in

Announcement Envelopes are very common Envelopes and are used for cards and Invitations.

Commercial Envelope Sizes
















































Name Size in millimeters Size in inches
No. 6¼ 89 mm x 152 mm 3 1/2 in x 6 in
No. 6¾ 92 mm x 165 mm 3 5/8 in x 6 1/2 in
No. 8 98 mm x 190 mm 3 7/8 in x 7 1/2 in
No. 9 98 mm x 225 mm 3 7/8 in x 8 7/8 in
No. 10 105 mm x 241 mm 4 1/8 in x 9 1/2 in
No. 11 114 mm x 263 mm 4 1/2 in x 10 3/8 in
No. 12 120 mm x 279 mm 4 3/4 in x 11 in
No. 14 127 mm x 292 mm 5 in x 11 1/2 in

Commercial Envelopes are standard-sized Envelopes that are used daily for regular mail.

Catalog Envelope Sizes














































































Name Size in millimeters Size in inches
No. 1 152 mm x 228 mm 6 in x 9 in
No. 1¾ 165 mm x 241 mm 6 1/2 in x 9 1/2 in
No. 2 165 mm x 254 mm 6 1/2 in x 10 in
No. 3 178 mm x 254 mm 7 in x 10 in
No. 6 190 mm x 266 mm 7 1/2 in x 10 1/2 in
No. 7 203 mm x 279 mm 8 in x 11 in
No. 8 209 mm x 286 mm 8 1/4 in x 11 1/4 in
No. 9½ 216 mm x 267 mm 8 1/2 in x 10 1/2 in
No. 9¾ 222 mm x 286 mm 8 3/4 in x 11 1/4 in
No. 10½ 229 mm x 305 mm 9 in x 12 in
No. 12½ 241 mm x 317 mm 9 1/2 in x 12 1/2 in
No. 13½ 254 mm x 330 mm 10 in x 13 in
No. 14¼ 286 mm x 311 mm 11 1/4 in x 12 1/4 in
No. 14½ 292 mm x 368 mm 11 1/2 in x 14 1/2 in

The catalog formats are mostly used for — you saw this one coming — Catalogs, folders, Flyers and magazines.

Using standard envelop sizes for your work is a logical step, Envelopes are available in a wide variety of dimensions and having custom Envelopes made is possible, but expensive.
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