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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.)

 

US Envelope Paper Sizes

 

FormatWidth × Height (in)Width × Height (mm)
6 × 3.5 in152 × 89 mm
6.5 × 3.6 in165 × 92 mm
76.8 × 3.7 in172 × 95 mm
7¾ Monarch7.5 × 3.9 in191 × 98 mm
8⅝8.6 × 3.6 in219 × 92 mm
98.9 × 3.9 in225 × 98 mm
109.5 × 4.1 in241 × 104 mm
1110.4 × 4.5 in264 × 114 mm
1211 × 4.8 in279 × 121 mm
1411.5 × 5 in292 × 127 mm
1612 × 6 in305 × 152 mm
A13.6 × 5.1 in92 × 130 mm
A2 Lady Grey5.7 × 4.4 in146 × 111 mm
A46.3 × 4.3 in159 × 108 mm
A6 Thompson’s Standard6.5 × 4.8 in165 × 121 mm
A7 Besselheim7.2 × 5.2 in184 × 133 mm
A8 Carr’s8.1 × 5.5 in206 × 140 mm
A9 Diplomat8.7 × 5.7 in222 × 146 mm
A10 Willow9.5 × 6 in241 × 152 mm
A Long8.9 × 3.9 in225 × 98 mm
19 × 6 in229 × 152 mm
9.5 × 6 in241 × 152 mm
310 × 7 in254 × 178 mm
610.5 × 7.5 in267 × 191 mm
811.3 × 8.3 in286 × 210 mm
11.3 × 8.7 in286 × 222 mm
10½12 × 9 in305 × 229 mm
12½12.5 × 9.5 in318 × 241 mm
13½13 × 10 in330 × 254 mm
14½14.5 × 11.5 in368 × 292 mm
1515 × 10 in381 × 254 mm
15½15.5 × 12 in394 × 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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