ISO standard determines the paper dimensions for the A paper series. The most common paper sizes are A0, A1, A2, A3, A4, A5.  The table below shows the dimension of the most common A series paper sizes.

Paper size Dimensions (cm)  Paper Area
Α5 14.8 x 21 cm  0.03108  m2
Α4 21 x 29.7 cm 0.0612  m2
Α3 29.7 x 42 cm 0.125 m2
Α2 42 x 59.4 cm  0.25 m2
Α1 59.4 x 84.1 cm 0.50  m2
Α0 84.1 x 118.9 cm 1 m2

Notice that if we split an A1 paper into two equal parts we get two A2 papers. If we split an A2 paper into two equal part we get two A3 papers. If we split an A3 paper into two equal part we get two A4 papers and so on. This is shown visual in the picture below.

Drawing sheet sizes. Printing paper sizes A0 A1 A2 A3 A4 A5

Paper sizes for technical drawing

The paper sizes for architectural, structural and mechanical drawing should be Α1, Α2 or Α3. 

  • Do not use A4. A4 paper size is too small and it looks unprofessional.
  • Do not use A0. A0 paper size is too big and it is difficult to ha

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