Free Envelope Size Calculator
Not sure which envelope fits your document? Select your paper size below to find the perfect envelope.
✉️ Find the Right Envelope
Recommended Envelope
DL Envelope
110 × 220 mm • Fits A4 folded in thirds
📏 Envelope Fitting Chart
| Content | Envelope | Envelope Size |
|---|---|---|
| A4 unfolded | C4 | 229 × 324 mm |
| A4 folded in half | C5 | 162 × 229 mm |
| A4 folded in thirds | DL | 110 × 220 mm |
| A4 folded in quarters | C6 | 114 × 162 mm |
| A5 unfolded | C5 | 162 × 229 mm |
| A5 folded in half | C6 | 114 × 162 mm |
| A6 unfolded | C6 | 114 × 162 mm |
| A3 unfolded | C3 | 324 × 458 mm |
| A2 unfolded | C2 | 458 × 648 mm |
| US Letter unfolded | C4 or 9×12" | 229 × 324 mm |
📊 Full C-Series Envelope Sizes
| Envelope | Size (mm) | Fits Paper |
|---|---|---|
| C0 | 917 × 1297 mm | A0 unfolded |
| C1 | 648 × 917 mm | A1 unfolded |
| C2 | 458 × 648 mm | A2 unfolded |
| C3 | 324 × 458 mm | A3 unfolded |
| C4 | 229 × 324 mm | A4 unfolded |
| C5 | 162 × 229 mm | A5 unfolded / A4 half |
| C6 | 114 × 162 mm | A6 unfolded / A4 quarter |
| C7 | 81 × 114 mm | A7 unfolded |
| DL | 110 × 220 mm | A4 folded in thirds |