A series of ISO paper sizes

See also:

This is the main series of ISO paper sizes. The basic size (“A0”) has an area of 1 square meter. All dimensions are in millimeters.

Size Dimensions
millimeters
Examples of Uses
A0 841 by 1189 “blueprints,” posters
A1 594 by 841  
A2 420 by 594  
A3 297 by 420 newspapers
A4 210 by 297 letters, magazines
A5 148 by 210  
A6 105 by 148 postcards (also microfiche)
A7 74 by 105 German ID card
A8 52 by 74  
A9 37 by 52  
A10 26 by 37  

A few other designations sometimes encountered are:

Size Dimensions
millimeters
Examples of Uses
4A0 1682 by 2378  
2A0 1189 by 1682  
¼ A3 105 by 297  
13 A4 99 by 210 memoranda
¼ A4 74 by 210  
18 A4 13 by 17  
13 A5 70 by 148  

Tolerances

The ISO standard specifies a tolerance of

National standards based on the ISO sizes sometimes specify tighter tolerances.

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