A-Series Paper Size Dimensions (in, Cm, Mm) - Neenah Paper

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

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:

Standard International Envelope Sizes

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