A12 Paper Size, Dimensions and Format (A series)

A12 in millimetres

13 x 18 mm




Aspect ratio 1:1.38
Area (A) 234 mm²
Perimeter (P) 62 mm
Diagonal (d) 22.20 mm


The A12 format measures 13 x 18 mm or inches. An A12 paper fromat has an aspect ratio of 1:1.38. The Area of the A12 paper size is 234 mm² or 0.35 in² with a perimeter of 62 mm or 2.40 in. An A12 format has a diagonal length of 22.20 mm or 0.86 in. The A12 size belongs to the A series. In the A series there are a total of 19 paper sizes.

Other A Paper Sizes

There are a total of 19 A Paper Sizes.