International Paper Sizes and Dimensions

Measurements for International Paper Sizes & Envelope Dimensions

There are three ranges of paper sizes, prefixed A, B and C. The most widely used for general printing and letterhead stationery is the A series. The most common of these sheet sizes is the international letterhead size A4, which measures 8-1/4 x 11-3/4 in, or 210 x 297 mm. These paper measurements are defined by the ISO 216 standard.

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Standard International Paper Sizes and Measurements

Paper Size	Inches	Millimeters	Centimeters
A0	33-1/8 x 46-13/16 in	841 x 1188 mm	84.1 x 118.8 cm
A1	23-3/8 x 33-1/8 in	594 x 841 mm	59.4 x 84.1 cm
A2	16-1/2 x 23-3/8 in	420 x 594 mm	42.0 x 59.4 cm
A3	11-3/4 x 16-1/2 in	297 x 420 mm	29.7 x 42.0 cm
A4	8-1/4 x 11-3/4 in	210 x 297 mm	21.0 x 29.7 cm
A5	5-7/8 x 8-1/4 in	148 x 210 mm	14.8 x 21.0 cm
A6	4-1/8 x 5-7/8 in	105 x 148 mm	10.5 x 14.8 cm
A7	2-15/16 x 4-1/8 in	74 x 105 mm	7.4 x 10.5 cm
A8	2-1/16 x 2-15/16 in	52 x 74 mm	5.2 x 7.4 cm

Standard International Envelope Sizes and Measurements

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

Folding Examples: