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Dimensions Of Paper Sizes Guide

Dimensions Of A Paper Sizes
Dimensions Of B Paper Sizes
Dimensions Of C Envelope Sizes
Dimensions Of RA & SRA Untrimmed Sizes
Newspaper Sizes
Postcard Sizes
US Paper Sizes
British Imperial Paper Sizes
Paper Size Scale & Magification Factors
Portrait & Landscape Paper
Paper Stock Types
Paper Quantities - Quire, Ream, Bundle, Bale & Pallet
What Is The Weight Of A Sheet Of Paper?
US to UK & International Paper Weights
Paper Weights
Paper Whiteness, Brightness & Shade
Dimensions US & North American Envlope Sizes
English Uncut Printing, Book & Drawing Paper Sizes
A4, Foolscap, Letter & Legal Paper Size Comparison

Dimensions Of A Series Paper Sizes


The dimensions of the A series paper sizes, as defined by ISO 216, are given in the table below in both millimetres and inches (cm measurements can be obtained by dividing mm value by 10). The A Series paper size chart to the right gives a visual explanation 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.

A Series Paper Sizes Chart

Dimensions Of A Series Paper Sizes

Table of Paper Sizes From 4A0 to A10

Size Height x Width (mm) Height x Width (in)
4A0 2378 x 1682 mm 93.6 x 66.2 in
2A0 1682 x 1189 mm 66.2 x 46.8 in
A0 1189 x 841 mm 46.8 x 33.1 in
A1 841 x 594 mm 33.1 x 23.4 in
A2 594 x 420 mm 23.4 x 16.5 in
A3 420 x 297 mm 16.5 x 11.7 in
A4 297 x 210 mm 11.7 x 8.3 in
A5 210 x 148 mm 8.3 x 5.8 in
A6 148 x 105 mm 5.8 x 4.1 in
A7 105 x 74 mm 4.1 x. 2.9 in
A8 74 x 52 mm 2.9 x 2.0 in
A9 52 x 37 mm 2.0 x 1.5 in
A10 37 x 26 mm 1.5 x 1.0 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.

4A0 & 2A0 - The DIN 476 Oversize Formats

The paper sizes bigger than A0, 4A0 & 2A0, aren't formerly 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.

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.

International Usage

The A series paper sizes are now in common use throughout the world apart from in the US, Canada and parts of Mexico. The A4 size has become the standard business letter size in English speaking countries such as Australia, New Zealand and the UK, that formerly used British Imperial sizes. In Europe the A paper sizes were adopted as the formal standard in the mid 20th century and from there they spread across the globe.