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ISO A PAPER SIZE

(29/02/2016)

The A-series consists of a logical set of paper sizes that are defined by the ISO 216 standard. The largest size (A0) measures one square meter. The height/width ratio remains constant (1:1.41) for all sizes. This means you get the A1 size by folding an A0 paper in two along its shortest side. Then fold the A1 size in two to get an A2 size paper, and so on… A-sizes are used to define the finished paper size in commercial printing: A4 is for office documents, A5 is for notepads and A6 is for postcards.

 

 

Millimeters

Inches

Points

 

Width

Height

Width

Height

Width

Height

A0

841

1189

33.11

46.81

2384

3370

A1

594

841

23.39

33.11

1684

2384

A2

420

594

16.54

23.39

1190

1684

A3

297

420

11.69

16.54

842

1190

A4

210

297

8.27

11.69

595

842

A5

148

210

5.83

8.27

420

595

A6

105

148

4.13

5.83

298

420

A7

74

105

2.91

4.13

210

298

A8

52

74

2.05

2.91

148

210

 

This drawing illustrates the principle behind the ISO A series:

 

 

Source: http://www.prepressure.com/library/paper-size