The A5 is paper size of 148 mm by 210 mm. On this page, we answer the following question: What is A5 size?
A0 relative to A5
An A0 has a surface area of 1 m². The length to width ratio of an A0 and all sizes of the A-series are √2:1. The area of an A5 is ½ × ½ × ½ × ½ × ½ = 1/32 m².
A5 paper size international
A5 size is an international paper size from the DIN quotation (DIN 476 from 1922). This standard has been changed to the ISO 216 standard. In parts of Germany people still speak of DIN A5. An A5 is part of the series A0, A1, A2, A3, A5, A5, A6, A7 and A8.
In North America and parts of Latin America, the ISO 216 standard is not used. Here US Letter size of 8½ by 11 inches (279.4 mm by 215.9 mm) is used. These 6 mm wider and 18 mm shorter than A4. The master printers and copiers can be set to both sizes.
Weight and mass
A commonly used weight for A5 paper is 80 grams. The 80 grams is for a paper of A0 size. A whole sheet of A0 paper is 80 grams. An A5 paper is 80/32 = 2,5 grams.
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