US Envelope Paper Sizes
A1
92 x 130
mm
mm
6¼
89 x 152
mm
mm
6¾
92 x 165
mm
mm
A2 Lady Grey
111 x 146
mm
mm
7
95 x 172
mm
mm
A4
108 x 159
mm
mm
7¾ Monarch
98 x 191
mm
mm
A6 Thompson's Standard
121 x 165
mm
mm
8⅝
92 x 219
mm
mm
9
98 x 225
mm
mm
A Long
98 x 225
mm
mm
A7 Besselheim
133 x 184
mm
mm
10
104 x 241
mm
mm
A8 Carr's
140 x 206
mm
mm
11
114 x 264
mm
mm
A9 Diplomat
146 x 222
mm
mm
12
121 x 279
mm
mm
1
152 x 229
mm
mm
1¾
152 x 241
mm
mm
A10 Willow
152 x 241
mm
mm
14
127 x 292
mm
mm
3
178 x 254
mm
mm
16
152 x 305
mm
mm
8
210 x 286
mm
mm
9¾
222 x 286
mm
mm
10½
229 x 305
mm
mm
12½
241 x 318
mm
mm
13½
254 x 330
mm
mm
15
254 x 381
mm
mm
14½
292 x 368
mm
mm
15½
305 x 394
mm
mm
Information
Traditional North American envelopes numbered from #6 to #14. #10 is the standard business envelope used for mailing letters.
US Envelope Paper Sizes — Width x Height (mm) / Width x Height (inches)
| Format | Width x Height (mm) | Width x Height (inches) |
|---|---|---|
| A1 | 92 x 130 | 3.62 x 5.12 |
| 6¼ | 89 x 152 | 3.5 x 5.98 |
| 6¾ | 92 x 165 | 3.62 x 6.5 |
| A2 Lady Grey | 111 x 146 | 4.37 x 5.75 |
| 7 | 95 x 172 | 3.74 x 6.77 |
| A4 | 108 x 159 | 4.25 x 6.26 |
| 7¾ Monarch | 98 x 191 | 3.86 x 7.52 |
| A6 Thompson's Standard | 121 x 165 | 4.76 x 6.5 |
| 8⅝ | 92 x 219 | 3.62 x 8.62 |
| 9 | 98 x 225 | 3.86 x 8.86 |
| A Long | 98 x 225 | 3.86 x 8.86 |
| A7 Besselheim | 133 x 184 | 5.24 x 7.24 |
| 10 | 104 x 241 | 4.09 x 9.49 |
| A8 Carr's | 140 x 206 | 5.51 x 8.11 |
| 11 | 114 x 264 | 4.49 x 10.39 |
| A9 Diplomat | 146 x 222 | 5.75 x 8.74 |
| 12 | 121 x 279 | 4.76 x 10.98 |
| 1 | 152 x 229 | 5.98 x 9.02 |
| 1¾ | 152 x 241 | 5.98 x 9.49 |
| A10 Willow | 152 x 241 | 5.98 x 9.49 |
| 14 | 127 x 292 | 5 x 11.5 |
| 3 | 178 x 254 | 7.01 x 10 |
| 16 | 152 x 305 | 5.98 x 12.01 |
| 8 | 210 x 286 | 8.27 x 11.26 |
| 9¾ | 222 x 286 | 8.74 x 11.26 |
| 10½ | 229 x 305 | 9.02 x 12.01 |
| 12½ | 241 x 318 | 9.49 x 12.52 |
| 13½ | 254 x 330 | 10 x 12.99 |
| 15 | 254 x 381 | 10 x 15 |
| 14½ | 292 x 368 | 11.5 x 14.49 |
| 15½ | 305 x 394 | 12.01 x 15.51 |