C Series Paper Sizes
C series paper sizes are designed for envelopes, sized to fit the corresponding A series sheet. For example, a C4 envelope fits an A4 sheet perfectly.
Visual Size Comparison
C0
917×1297
C1
648×917
C2
458×648
C3
324×458
C4
229×324
C5
162×229
C6
114×162
C7
81×114
C8
57×81
C Series Paper Sizes Detailed Chart
| Name | Width (mm) | Height (mm) | Width (cm) | Height (cm) | Width (in) | Height (in) |
|---|---|---|---|---|---|---|
| C0 | 917 | 1297 | 91.7 | 129.7 | 36.1 | 51.06 |
| C1 | 648 | 917 | 64.8 | 91.7 | 25.51 | 36.1 |
| C2 | 458 | 648 | 45.8 | 64.8 | 18.03 | 25.51 |
| C3 | 324 | 458 | 32.4 | 45.8 | 12.76 | 18.03 |
| C4 | 229 | 324 | 22.9 | 32.4 | 9.02 | 12.76 |
| C5 | 162 | 229 | 16.2 | 22.9 | 6.38 | 9.02 |
| C6 | 114 | 162 | 11.4 | 16.2 | 4.49 | 6.38 |
| C7 | 81 | 114 | 8.1 | 11.4 | 3.19 | 4.49 |
| C8 | 57 | 81 | 5.7 | 8.1 | 2.24 | 3.19 |
C Series Paper Sizes Common Uses
C series paper is designed for envelopes. C4 envelopes fit A4 sheets, C5 envelopes fit A5 sheets. DL envelopes (110×220mm) are the most common business envelopes.