A Series
Use this handy dimensions guide to know your way around A series paper sizes and their usage.
| Size | Dimension (inch) | Dimension (mm) |
|---|---|---|
| A0 | 33.11 x 46.81 in | 841 x 1189 mm |
| A1 | 23.39 x 33.11 in | 594 x 841 mm |
| A2 | 16.54 x 23.39 in | 420 x 594 mm |
| A3 | 11.69 x 16.54 in | 297 x 420 mm |
| A4 | 8.27 x 11.69 in | 210 x 297 mm |
| A5 | 5.83 x 8.27 in | 148 x 210 mm |
| A6 | 4.13 x 5.83 in | 105 x 148 mm |
| A7 | 2.91 x 4.13 in | 74 x 105 mm |
| A8 | 2.05 x 2.91 in | 52 x 74 mm |
| A9 | 1.46 x 2.05 in | 37 x 52 mm |
| A10 | 1.02 x 1.46 in | 26 x 37 mm |
The A series papers are most commonly used for paperwork, business publications, as well as for communications and promotional materials. It comprises a logical set of paper sizes defined in the ISO 216 International Standard. In fact, you may have used an A series size paper so many times without realizing it.
A4 sized paper is deemed as one of the most common layout used worldwide, except in the United States, Canada and Mexico.
A0, the largest in this series, measures 84.1 x 118.9 cm. The succeeding sizes A1 to A10 are based on each size being half the size of the previous one, when folded. This also means that the length of one size is equal to the width of the size bigger to it. The quotient of the length divided by the width is 1.4142, and the series’ aspect ratio is 1:?2.
This size format offers useful applications such as enlarging and reducing images without any cutoff or margins. It can also be used to make a booklet by folding sheets in half.