A guide to the many envelope sizes that you may encounter in your daily business activities.
| Type | mm | Suitable For |
DL | 110 × 220 | 1/3 A4 |
C7/C6 | 81 x 162 | 1/3 A5 |
C6 | 114 × 162 | A6 (A4 folded twice) |
C6/C5 | 114 × 229 | 1/3 A4 |
C5 | 162 × 229 | A5 (A4 folded once) |
C4 | 229 × 324 | A4 |
C3 | 324 × 458 | A3 |
C2 | 458 × 648 | A2 |
C1 | 648 × 917 | A1 |
C0 | 917 × 1297 | A0 |
B6 | 125 × 176 | C6 |
B5 | 176 × 250 | C5 |
B4 | 250 × 353 | C4 |
E3 | 280 × 400 | B4 |