Dimensions of US Envelope Paper Sizes | 6¼, 6¾, 7, 7¾ etc.

Dimensions of US Envelope Paper Sizes | 6¼, 6¾, 7, 7¾ etc. Paper size

 

There are dozens of sizes of envelopes available.

The designations such as “A2” do not correspond to ISO paper sizes. (Often, North American paper jobbers and printers will insert a hyphen to distinguish from ISO sizes, thus: A-2.)

 

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US Envelope Paper Sizes

 

Format Width × Height (in) Width × Height (mm)
6 × 3.5 in 152 × 89 mm
6.5 × 3.6 in 165 × 92 mm
7 6.8 × 3.7 in 172 × 95 mm
7¾ Monarch 7.5 × 3.9 in 191 × 98 mm
8⅝ 8.6 × 3.6 in 219 × 92 mm
9 8.9 × 3.9 in 225 × 98 mm
10 9.5 × 4.1 in 241 × 104 mm
11 10.4 × 4.5 in 264 × 114 mm
12 11 × 4.8 in 279 × 121 mm
14 11.5 × 5 in 292 × 127 mm
16 12 × 6 in 305 × 152 mm
A1 3.6 × 5.1 in 92 × 130 mm
A2 Lady Grey 5.7 × 4.4 in 146 × 111 mm
A4 6.3 × 4.3 in 159 × 108 mm
A6 Thompson’s Standard 6.5 × 4.8 in 165 × 121 mm
A7 Besselheim 7.2 × 5.2 in 184 × 133 mm
A8 Carr’s 8.1 × 5.5 in 206 × 140 mm
A9 Diplomat 8.7 × 5.7 in 222 × 146 mm
A10 Willow 9.5 × 6 in 241 × 152 mm
A Long 8.9 × 3.9 in 225 × 98 mm
1 9 × 6 in 229 × 152 mm
9.5 × 6 in 241 × 152 mm
3 10 × 7 in 254 × 178 mm
6 10.5 × 7.5 in 267 × 191 mm
8 11.3 × 8.3 in 286 × 210 mm
11.3 × 8.7 in 286 × 222 mm
10½ 12 × 9 in 305 × 229 mm
12½ 12.5 × 9.5 in 318 × 241 mm
13½ 13 × 10 in 330 × 254 mm
14½ 14.5 × 11.5 in 368 × 292 mm
15 15 × 10 in 381 × 254 mm
15½ 15.5 × 12 in 394 × 305 mm

 

The No. 10 envelope is the standard business envelope size in the United States.

Envelopes accepted by the U.S. Postal Service for mailing at the price of a letter must be:

  • Rectangular
  • At least ​3 12 inches high × 5 inches long × 0.007 inch thick.
  • No more than ​6 18 inches high × ​11 12 inches long × ​14 inch thick.
  • Letters that have a length-to-height aspect ratio of less than 1.3 or more than 2.5 are classified as “non-machinable” by the USPS and may cost more to mail.

 

 

 

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