Size Guide
Here’s a handy list of the most common C sizes and how they relate to A paper sizing.
Please note that all our product sizing refers to the is internal measurement of the envelope.
| C Name | Size (mm) | Paper Size |
|---|---|---|
| C0 | 917 x 1297 | A0 |
| C1 | 648 x 917 | A1 |
| C2 | 458 x 648 | A2 |
| C3 | 324 x 458 | A3 |
| C4 | 229 x 324 | A4, A3 folded in half |
| C5 | 162 x 229 | A5, A4 folded in half |
| C6 | 114 x 162 | A6, A4 folded in four parts |
| C7 | 81 x 113 | A7, A5 folded in four parts |
| C8 | 57 x 81 | A8 |
| C9 | 40 x 57 | A9 |
| C10 | 28 x 40 | A10 |
Still Need Help? Read our comprehensive guide to envelope sizes, closures and the types of envelopes you can buy.
Your Complete Guide to Envelope Sizes, Types & Closures
Alternatively get in touch with one of the team at sales@postalpackaging.com and we'll be happy to help.