Paper Size Reference
Complete reference for every international paper size standard — ISO 216, ANSI, JIS, DIN and more. Every size listed in mm, cm, inches, points, picas, and pixels.
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About Paper Sizes
Paper sizes are standardized internationally through ISO 216 (A, B, C series), ANSI/ASME Y14.1 (US sizes), JIS (Japan), DIN (Germany), and many more regional standards. Our database lists over 200 paper sizes with full unit conversions.
Frequently Asked Questions
What is the most common paper size?
A4 (210 × 297 mm) is the most common paper size worldwide. In North America, US Letter (8.5 × 11 inches, 216 × 279 mm) is the everyday standard.
What is A4 in pixels?
At 300 DPI, A4 is 2480 × 3508 pixels. At 72 DPI (screen), it is 595 × 842 pixels.
Is A4 the same as US Letter?
No. A4 is 210 × 297 mm and US Letter is 216 × 279 mm. A4 is narrower and taller. Printing A4 on Letter (or vice versa) usually requires scaling to fit.