ENVELOPE SIZES
| Format | Size [mm] | Content Format |
|---|---|---|
| C6 | 114 × 162 | A4 folded twice = A6 |
| DL | 110 × 220 | A4 folded twice = 1/3 A4 |
| C6/C5 | 114 × 229 | A4 folded twice = 1/3 A4 |
| C5 | 162 × 229 | A4 folded once = A5 |
| C4 | 229 × 324 | A4 |
| C3 | 324 × 458 | A3 |
| B6 | 125 × 176 | C6 envelope |
| B5 | 176 × 250 | C5 envelope |
| B4 | 250 × 353 | C4 envelope |
| E4 | 280 × 400 | B4 |
Home Contact Paper Sizes UK Postage Rates