Information
US ENVELOPE 10½ measures 305 × 229 mm (12 × 9 inch) with an aspect ratio of 1.33, perimeter of 1.07 m, diagonal of 0.38 m and an area of 0.069845 m².
Common query: 305x229 mm, 12x9 inches.
US envelopes
6¼
152 x 89 mm
6 x 3.5 inch
6¾
165 x 92 mm
6.5 x 3.6 inch
7
172 x 95 mm
6.8 x 3.7 inch
7¾ Monarch
191 x 98 mm
7.5 x 3.9 inch
8⅝
219 x 92 mm
8.6 x 3.6 inch
9
225 x 98 mm
8.9 x 3.9 inch
10
241 x 104 mm
9.5 x 4.1 inch
11
264 x 114 mm
10.4 x 4.5 inch
12
279 x 121 mm
11 x 4.8 inch
14
292 x 127 mm
11.5 x 5 inch
16
305 x 152 mm
12 x 6 inch
A1
92 x 130 mm
3.6 x 5.1 inch
A2 Lady Grey
146 x 111 mm
5.7 x 4.4 inch
A4
159 x 108 mm
6.3 x 4.3 inch
A6 Thompson's Standard
165 x 121 mm
6.5 x 4.8 inch
A7 Besselheim
184 x 133 mm
7.2 x 5.2 inch
A8 Carr's
206 x 140 mm
8.1 x 5.5 inch
A9 Diplomat
222 x 146 mm
8.7 x 5.7 inch
A10 Willow
241 x 152 mm
9.5 x 6 inch
A Long
225 x 98 mm
8.9 x 3.9 inch
1
229 x 152 mm
9 x 6 inch
1¾
241 x 152 mm
9.5 x 6 inch
3
254 x 178 mm
10 x 7 inch
6
267 x 191 mm
10.5 x 7.5 inch
8
286 x 210 mm
11.3 x 8.3 inch
9¾
286 x 222 mm
11.3 x 8.7 inch
10½
305 x 229 mm
12 x 9 inch
12½
318 x 241 mm
12.5 x 9.5 inch
13½
330 x 254 mm
13 x 10 inch
14½
368 x 292 mm
14.5 x 11.5 inch
15
381 x 254 mm
15 x 10 inch
15½
394 x 305 mm
15.5 x 12 inch