US Envelope Paper Sizes
Standard envelope formats used in North America for business billing, personal cards, and commercial mailing.
6¼
3.50 × 6.00inches6¾
3.63 × 6.50inches7
3.75 × 6.75inches7¾ Monarch
3.88 × 7.50inches8⅝
3.63 × 8.63inches9
3.88 × 8.88inches10
4.13 × 9.50inches11
4.50 × 10.38inches12
4.75 × 11.00inches14
5.00 × 11.50inches15
10.00 × 15.00inches16
6.00 × 12.00inches1
6.00 × 9.00inches1¾
6.00 × 9.50inches3
7.00 × 10.00inches6
7.50 × 10.50inches8
8.25 × 11.25inches9¾
8.75 × 11.25inches10½
9.00 × 12.00inches12½
9.50 × 12.50inches13½
10.00 × 13.00inches14½
11.50 × 14.50inches15½
12.00 × 15.50inchesA1
3.63 × 5.13inchesA2 Lady Grey
4.38 × 5.75inchesA4
4.25 × 6.25inchesA6 Thompson's Standard
4.75 × 6.50inchesA7 Besselheim
5.25 × 7.25inchesA8 Carr's
5.50 × 8.13inchesA9 Diplomat
5.75 × 8.75inchesA10 Willow
6.00 × 9.50inchesA Long
3.88 × 8.88inches
3.50 × 6.00inches6¾
3.63 × 6.50inches7
3.75 × 6.75inches7¾ Monarch
3.88 × 7.50inches8⅝
3.63 × 8.63inches9
3.88 × 8.88inches10
4.13 × 9.50inches11
4.50 × 10.38inches12
4.75 × 11.00inches14
5.00 × 11.50inches15
10.00 × 15.00inches16
6.00 × 12.00inches1
6.00 × 9.00inches1¾
6.00 × 9.50inches3
7.00 × 10.00inches6
7.50 × 10.50inches8
8.25 × 11.25inches9¾
8.75 × 11.25inches10½
9.00 × 12.00inches12½
9.50 × 12.50inches13½
10.00 × 13.00inches14½
11.50 × 14.50inches15½
12.00 × 15.50inchesA1
3.63 × 5.13inchesA2 Lady Grey
4.38 × 5.75inchesA4
4.25 × 6.25inchesA6 Thompson's Standard
4.75 × 6.50inchesA7 Besselheim
5.25 × 7.25inchesA8 Carr's
5.50 × 8.13inchesA9 Diplomat
5.75 × 8.75inchesA10 Willow
6.00 × 9.50inchesA Long
3.88 × 8.88inches