Paper Sizes & Folding Types

Paper Sizes:

The following table shows the width and height of all ISO A and B paper formats, as well as the ISO C envelope formats. The dimensions are in millimetres:

A Series Formats B Series Formats C Series Formats
4A0 1682 × 2378
2A0 1189 × 1682
A0 841 × 1189 B0 1000 × 1414 C0 917 × 1297
A1 594 × 841 B1 707 × 1000 C1 648 × 917
A2 420 × 594 B2 500 × 707 C2 458 × 648
A3 297 × 420 B3 353 × 500 C3 324 × 458
A4 210 × 297 B4 250 × 353 C4 229 × 324
A5 148 × 210 B5 176 × 250 C5 162 × 229
105 × 148 B6 125 × 176 C6 114 × 162
A7 74 × 105 B7 88 × 125 C7 81 × 114
A8 52 × 74 B8 62 × 88 C8 57 × 81
A9 37 × 52 B9 44 × 62 C9 40 × 57
A10 26 × 37 B10 31 × 44 C10 28 × 40

Envelope Formats:

For postal purposes, ISO 269 and DIN 678 define the following envelope formats:

Format Size [mm] Content Format
C6 114 × 162 A4 folded twice = A6
DL 110 × 220 A4 folded twice = 1/3 A4
C6/C5 114 × 229 A4 folded twice = 1/3 A4
C5 162 × 229 A4 folded once = A5
C4 229 × 324 A4
C3 324 × 458 A3
B6 125 × 176 C6 envelope
B5 176 × 250 C5 envelope
B4 250 × 353 C4 envelope
E4 280 × 400 B4

Common Parallel Folds:

Common Right Angle Folds: