A6

A6 is a paper size that is often used for postcards. More exotic uses are small pocket books, library microfiches and toilet paper.

Dimensions

A6 measures 105 × 148 millimeters or 4.13 × 5.83 inches. In PostScript, its dimensions are  rounded off to 298 × 420 points. The matching envelope format is C6 (114 × 162 mm).

Part of the ISO 216 standard

A6 is part of a set or range of page sizes, called the ISO A or ISO 216 standard. This international standard is based on the German DIN 476 standard from 1922. A6 is actually often referred to as DIN A6. The Japanese have adopted the same range of paper sizes in their JIS P 0138-61 standard.

By folding an A6 in two along its shortest side, you create an A7 document. Two A6 pages next to each other in a spread equals the A5 paper size. This way a range of paper sizes are created from A0 (which has a surface of one square meter) to A10. The height/width ratio remains constant (1:1.41 or the square root of 2) for all sizes. The dimensions always get rounded to the nearest millimeter.

Alternatives

None added yet.

Other sources of information

An elaborate yet easy to read page on the ISO 216 standard can be found here.