International Envelope Paper Sizes
International envelope sizes follow the ISO 269 standard. The DL envelope is the most commonly used internationally, designed to hold an A4 sheet folded in thirds.
All International Envelope Paper Sizes Dimensions
| Size | Width × Height (mm) | Width × Height (in) | Width × Height (cm) |
|---|---|---|---|
| DL | 110 × 220 | 4.33 × 8.66 | 11.00 × 22.00 |
| C5 | 162 × 229 | 6.38 × 9.02 | 16.20 × 22.90 |
| C4 | 229 × 324 | 9.02 × 12.76 | 22.90 × 32.40 |
| C6 | 114 × 162 | 4.49 × 6.38 | 11.40 × 16.20 |
| C6/C5 | 114 × 229 | 4.49 × 9.02 | 11.40 × 22.90 |
| E65 | 110 × 220 | 4.33 × 8.66 | 11.00 × 22.00 |
| E5 | 115 × 220 | 4.53 × 8.66 | 11.50 × 22.00 |
| E6 | 110 × 155 | 4.33 × 6.10 | 11.00 × 15.50 |
| B5 | 176 × 250 | 6.93 × 9.84 | 17.60 × 25.00 |
| B6 | 125 × 176 | 4.92 × 6.93 | 12.50 × 17.60 |
| B4 | 250 × 353 | 9.84 × 13.90 | 25.00 × 35.30 |