Size Unit Dimensions 4A0   2A0   A0   A1   A2   A3   A4   A5   A6   A7   A8   A9   A10   B Sizes   C Sizes   US Sizes in mm   cm   m   inches   More Units   Pixels is 210 x 297

# Dimensions Of A Series Paper Sizes

The dimensions of the A series paper sizes, as defined by the ISO 216 standard, are given in the table below the diagram in both millimetres and inches (cm measurements can be obtained by dividing mm value by 10). The A Series paper size chart, below left, gives a visual representation of how the sizes relate to each other - for example A5 is half of A4 size paper and A2 is half of A1 size paper.

## Table of Paper Sizes From 4A0 to A10

SizeWidth x Height (mm)Width x Height (in)
4A01682 x 2378 mm66.2 x 93.6 in
2A01189 x 1682 mm46.8 x 66.2 in
A0841 x 1189 mm33.1 x 46.8 in
A1594 x 841 mm23.4 x 33.1 in
A2420 x 594 mm16.5 x 23.4 in
A3297 x 420 mm11.7 x 16.5 in
A4210 x 297 mm8.3 x 11.7 in
A5148 x 210 mm5.8 x 8.3 in
A6105 x 148 mm4.1 x 5.8 in
A774 x 105 mm2.9 x 4.1 in
A852 x 74 mm2.0 x 2.9 in
A937 x 52 mm1.5 x 2.0 in
A1026 x 37 mm1.0 x 1.5 in

To obtain paper sizes in centimetres, convert mm values to cm by dividing by 10 and in feet by dividing inch values by 12. More units here and sizes in pixels here.

## 4A0 & 2A0 - The DIN 476 Oversize Formats

The paper sizes bigger than A0, 4A0 & 2A0, aren't formally defined by ISO 216 but are commonly used for oversized paper. The origin of these formats is in the German DIN 476 standard, that was the original base document from which ISO 216 was derived. 2A0 is sometimes described as A00, however this naming convention is not used for 4A0.

## A Series Paper Size Tolerances

ISO 216 specifies tolerances for the production of A series paper sizes as follows:

• ±1.5 mm (0.06 in) for dimensions up to 150 mm (5.9 in)
• ±2 mm (0.08 in) for lengths in the range 150 to 600 mm (5.9 to 23.6 in)
• ±3 mm (0.12 in) for any dimension above 600 mm (23.6 in)

## A Series Paper Sizes Defined

The A series paper sizes are defined in ISO 216 by the following requirements:

• The length divided by the width is 1.4142
• The A0 size has an area of 1 square metre.
• Each subsequent size A(n) is defined as A(n-1) cut in half parallel to its shorter sides.
• The standard length and width of each size is rounded to the nearest millimetre.

Note: For reference the last item is there because the root 2 aspect ratio doesn't always give a whole number.