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A-series paper sizes in inches, cm and pixels, matched to our listed sizes
A4 is 210 x 297 mm, which is 8.27 x 11.69 inches (21 x 29.7 cm) and needs about 827 x 1,169 pixels at 100 pixels per inch. The table gives A0 to A6 and the closest listed print size for each.
A2 to A6 drawn nested to scale: each size is half the area of the one before it.
A0 to A6 converted
| Size | mm | Inches | cm | Pixels at 100 ppi | Closest listed size (in) |
|---|---|---|---|---|---|
| A0 | 841 x 1189 | 33.11 x 46.81 | 84.1 x 118.9 | 3,311 x 4,681 | 36 x 48 (4.08 in total difference) |
| A1 | 594 x 841 | 23.39 x 33.11 | 59.4 x 84.1 | 2,339 x 3,311 | 24 x 36 (3.50 in total difference) |
| A2 | 420 x 594 | 16.54 x 23.39 | 42 x 59.4 | 1,654 x 2,339 | 16 x 24 (1.15 in total difference) |
| A3 | 297 x 420 | 11.69 x 16.54 | 29.7 x 42 | 1,169 x 1,654 | 11.7 x 16.5 (0.04 in total difference) |
| A4 | 210 x 297 | 8.27 x 11.69 | 21 x 29.7 | 827 x 1,169 | 8.3 x 11.7 (0.04 in total difference) |
| A5 | 148 x 210 | 5.83 x 8.27 | 14.8 x 21 | 583 x 827 | 6 x 8 (0.44 in total difference) |
| A6 | 105 x 148 | 4.13 x 5.83 | 10.5 x 14.8 | 413 x 583 | 4 x 6 (0.31 in total difference) |
Each A size is half the area of the one before, and every sheet has sides in the ratio 1 to the square root of 2 (about 1.414). A0 is defined as 1 square metre before rounding to the millimetre. Inches are mm divided by 25.4. The closest listed size is the one with the smallest total side difference over all sizes on the rate card, in either orientation; it is a nearest match, not an exact one.
The rate card lists photo frames at 8.3 x 11.7 and 11.7 x 16.5 inches, which are the A4 and A3 shapes. For frame sizes see photo frame sizes in inches and cm.
Related
Sources: A-series sizes: ISO 216 as described by Wikipedia and Markus Kuhn, University of Cambridge. 1 inch = 2.54 cm exactly: NIST and Wikipedia. 100 pixels per inch: ArtzFolio standard print-file production rules. Prices, GST rates and sizes: ArtzFolio Custom rate card (our price list file, generated 2026-11-10). All other figures are arithmetic shown on this page. Data as of 2026-11-10; page checked 2026-11-12. Always confirm the live price in the studio before ordering.