ISO 216 is the international standard for paper sizes, and includes sizes such as A4, A3, etc. Here is a list some the A, B and C series sizes, and also some common US paper sizes.
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ISO 216 A series paper sizes
A series paper sizes are some of the most popular in the world, with A4 paper being a standard for home printers and scanners. The dimensions are designed with an aspect ration of 1:1.4142 so that they double with each size - A3 is the same as two sheets of A4 joined together, A4 two sheets of A5 and so on.
| Size | millimeters | inches |
|---|---|---|
| A0 | 841mm x 1189mm | 33.1" x 46.8" |
| A1 | 594mm x 841mm | 23.4" x 33.1" |
| A2 | 420mm x 594mm | 16.5" x 23.4" |
| A3 | 297mm x 420mm | 11.7" x 16.5" |
| A4 | 210mm x 297mm | 8.3" x 11.7" |
| A5 | 148mm x 210mm | 5.8" x 8.3" |
| A6 | 105mm x 148mm | 4.1" x 5.8" |
| A7 | 74mm x 105mm | 2.9" x 4.1" |
| A8 | 52mm x 74mm | 2.0" x 2.9" |
| A9 | 37mm x 52mm | 1.5" x 2.0" |
| A10 | 26mm x 37mm | 1.0" x 1.5" |
ISO 216 B series paper sizes
B sizes are less popular, and are based on B0 being a metre wide. B5 is a common size for books, and the series is also used for envelopes and passports. Many posters and art prints are printed to approximate B sizes.
| Size | millimeters | inches |
|---|---|---|
| B0 | 1000mm x 1414mm | 39.4" x 55.7" |
| B1 | 707mm x 1000mm | 27.8" x 39.4" |
| B2 | 500mm x 707mm | 19.7" x 27.8" |
| B3 | 353mm x 500mm | 13.9" x 19.7" |
| B4 | 250mm x 353mm | 9.8" x 13.9" |
| B5 | 176mm x 250mm | 6.9" x 9.8" |
| B6 | 125mm x 176mm | 4.9" x 6.9" |
| B7 | 88mm x 125mm | 3.5" x 4.9" |
| B8 | 62mm x 88mm | 2.4" x 3.5" |
| B9 | 44mm x 62mm | 1.7" x 2.4" |
| B10 | 31mm x 44mm | 1.2" x 1.7" |