International Sizes


International Sizes

There are three ranges of sizes, prefixed A, B and C. The most widely used for general printing and letterhead stationery is the A series. The international letterhead size is an A4.

A-Style Sizes


Standard International Paper Sizes

Size Inches Millimeters
A0 33-1/8 x 46-13/16 841 x 1188
A1 23-3/8 x 33-1/8 549 x 841
A2 16-1/2 x 23-3/8 420 x 594
A3 11-3/4 x 16-1/2 297 x 420
A4 8-1/4 x 11-3/4 210 x 297
A5 5-7/8 x 8-1/4 148 x 210
A6 4-1/8 x 5-7/8 105 x 148
A7 2-15/16 x 4-1/8 74 x 105
A8 2-1/16 x 2-15/16 52 x 74


Standard International Envelope Sizes

Size Inches Millimeters Suitable Paper Formats
C4 12-3/4 x 9 324 x 229 Flat A4 or A3 folded once
C5 6-3/8 x 9 162 x 229 Flat A5, A4 folded once, or A3 folded twice
C6 4-1/2 x 6-3/8 114 x 162 Flat A6, A5 folded once, or A4 folded twice
C7/6 3-1/2 x 6-1/2 89 x 165 1/3 A4
DL 4-1/4 x 8-5/8 110 x 220 A5 folded once or A4 folded twice



Example:     A-Style Examples

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