12 1/2 (Catalog) Envelope Size Size
According to 12 1/2 (Catalog) Envelope Size format envelope size, the width of the envelope is 318mm(12.5 inches) and the height is 241mm(9.5 inches), as shown in the picture on the right.
| Format/name | 12 1/2 (Catalog) Envelope Size |
|---|---|
| Width(mm) | 318 mm |
| Width(in) | 12.5 inches |
| Height(mm) | 241 mm |
| Height(in) | 9.5 inches |
Taking our commonly used credit cards as a reference, the size of the credit card is 85.6 mm x 53.98 mm (3.4 in X 2.1 in). The photo size in 12 1/2 (Catalog) Envelope Size format is approximately 3.7 times the width of the credit card and approximately 4.5 times the height of the credit card.
318mm
241 mm
241 mm
North American Standard Envelope Sizes
| Format | Width × Height (mm) | Width × Height (cm) | Width × Height (in) |
|---|---|---|---|
| 6 1/4 (Commercial) | 152 × 89 mm | 15.2 × 8.9 cm | 6 × 3.5 in |
| 6 3/4(Commercial) | 165 × 92 mm | 16.5 × 9.2 cm | 6.5 × 3.6 in |
| 7 (Commercial) | 172 × 95 mm | 17.2 × 9.5 cm | 6.8 × 3.7 in |
| 7 3/4 Monarch (Commercial) | 191 × 98 mm | 19.1 × 9.8 cm | 7.5 × 3.9 in |
| 8 5/8(Commercial) | 219 × 92 mm | 21.9 × 9.2 cm | 8.6 × 3.6 in |
| 9(Commercial) | 225 × 98 mm | 22.5 × 9.8 cm | 8.9 × 3.9 in |
| 10(Commercial) | 241 × 104 mm | 24.1 × 10.4 cm | 9.5 × 4.1 in |
| 11(Commercial) | 264 × 114 mm | 26.4 × 11.4 cm | 10.4 × 4.5 in |
| 12(Commercial) | 279 × 121 mm | 27.9 × 12.1 cm | 11 × 4.8 in |
| 14(Commercial) | 292 × 127 mm | 29.2 × 12.7 cm | 11.5 × 5 in |
| 16(Commercial) | 305 × 152 mm | 30.5 × 15.2 cm | 12 × 6 in |
| A1 (Announcement) | 92 × 130 mm | 9.2 × 13 cm | 3.6 × 5.1 in |
| A2 Lady Grey (Announcement) | 146 × 111 mm | 14.6 × 11.1 cm | 5.7 × 4.4 in |
| A4 (Announcement) | 159 × 108 mm | 15.9 × 10.8 cm | 6.3 × 4.3 in |
| A6 Thompson's Standard (Announcement) |
165 × 121 mm | 16.5 × 12.1 cm | 6.5 × 4.8 in |
| A7 Besselheim (Announcement) |
184 × 133 mm | 18.4 × 13.3 cm | 7.2 × 5.2 in |
| A8 Carr's (Announcement) | 206 × 140 mm | 20.6 × 14 cm | 8.1 × 5.5 in |
| A9 Diplomat (Announcement) | 222 × 146 mm | 22.2 × 14.6 cm | 8.7 × 5.7 in |
| A10 Willow (Announcement) | 241 × 152 mm | 24.1 × 15.2 cm | 9.5 × 6 in |
| A Long (Announcement) | 225 × 98 mm | 22.5 × 9.8 cm | 8.9 × 3.9 in |
| 1 (Catalog) | 229 × 152 mm | 22.9 × 15.2 cm | 9 × 6 in |
| 1 3/4 (Catalog) | 241 × 152 mm | 24.1 × 15.2 cm | 9.5 × 6 in |
| 3 (Catalog) | 254 × 178 mm | 25.4 × 17.8 cm | 10 × 7 in |
| 6 (Catalog) | 267 × 191 mm | 26.7 × 19.1 cm | 10.5 × 7.5 in |
| 8 (Catalog) | 286 × 210 mm | 28.6 × 21 cm | 11.3 × 8.3 in |
| 9 3/4 (Catalog) | 286 × 222 mm | 28.6 × 22.2 cm | 11.3 × 8.7 in |
| 10 1/2 (Catalog) | 305 × 229 mm | 30.5 × 22.9 cm | 12 × 9 in |
| 12 1/2 (Catalog) | 318 × 241 mm | 31.8 × 24.1 cm | 12.5 × 9.5 in |
| 13 1/2 (Catalog) | 330 × 254 mm | 33 × 25.4 cm | 13 × 10 in |
| 14 1/2 (Catalog) | 368 × 292 mm | 36.8 × 29.2 cm | 14.5 × 11.5 in |
| 15 (Catalog) | 381 × 254 mm | 38.1 × 25.4 cm | 15 × 10 in |
| 15 1/2 (Catalog) | 394 × 305 mm | 39.4 × 30.5 cm | 15.5 × 12 in |
International Standard Envelope Sizes
| Format | Width × Height (mm) | Width × Height (cm) | Width × Height (in) | AR |
|---|---|---|---|---|
| DL | 110 × 220 | 11 × 22 | 4.3 x 8.7 | 2∶1 |
| C7 | 81 × 114 | 8.1 × 11.4 | 3.2 x 4.5 | √2∶1 |
| C7/C6 | 81 × 162 | 8.1 × 16.2 | 3.2 × 6.4 | 2∶1 |
| C6 | 114 × 162 | 11.4 × 16.2 | 4.5 × 6.4 | √2∶1 |
| C6/C5 | 114 × 229 | 11.4 × 22.9 | 4.5 × 9 | 2∶1 |
| C5 | 162 × 229 | 16.2 × 22.9 | 6.4 × 9 | √2∶1 |
| C4 | 229 × 324 | 22.9 × 32.4 | 9 × 12.8 | √2∶1 |
| C3 | 324 × 458 | 32.4 × 45.8 | 12.8 × 18 | √2∶1 |
| B6 | 125 × 176 | 12.5 × 17.6 | 4.9 × 6.9 | √2∶1 |
| B5 | 176 × 250 | 17.6 × 25 | 6.9 × 9.8 | √2∶1 |
| B4 | 250 × 353 | 25 × 35.3 | 9.8 × 13.9 | √2∶1 |
| E4 | 280 × 400 | 28 × 40 | 11 × 15.7 | 10∶7 |
