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 hello@lempac.com and we'll be happy to help.