The base A0 size of paper is defined as having an area of 1 m2 and a dimension ratio of 1 to √2. Successive paper sizes in the series A1, A2, A3, and so forth, are defined by halving the preceding paper size across the larger dimension.

Dimensions of the A series paper sizes 4A0, 2A0, A0, A1, A2, A3, A4, A5, A6, A7, A8, A9 and A10 width and height in inches (in), millimetres (mm), centimetres (cm) and metres (m).

What paper sizes will work best for your printing projects? Learn the difference between A0, A1, A2, A3, A4, A5 and A6 sizes in this helpful visual guide.

Standard A Sizes for Printing - A0 size is 1189 x 841mm, A1 size is 841 x 594mm, A2 size is 594 x 420mm, A3 size is 420 x 297mm, A4 size is 297 x 210mm

For example, the dimensions of A4 paper are 210x297mm, and half of A4 equals A5, and double A4 equals A3. Starting from A0, all subsequent A paper sizes are determined by halving the paper on its longest size. A0 halves to become A1, which …

Folding an A0 size creates an A1 size, folding an A1 size creates an A2 size, and so on. If you’re struggling to imagine just how big an A3 size is, just picture two A4 size papers sitting next to each other. In other words, each size is based on the square root of two.

A0 is sixteen times the size of an A4 paper sheet. Check the differences between all the paper sizes in the world.

The A0, which is 1 square meter, can be declined above and below, to size A10. The length of the smaller size is always equal to width of the larger size. The smaller size is obtained by folding in half the larger size in its longest side.

The basic paper size in Europe is A0, which has an area of 1 m² with a size of 1189 x 841 mm. In a sheet of A0 are 16 sheets of A4.

Starting with the biggest internationally recognised paper size in the A-series is A0. A0 is a paper size that is typically used for technical drawings and posters. Folding an A0 along its shortest side will create an A1 document.