A12 Paper Size, Dimensions and Format (A series)


13 x 18




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


The A12 format measures 13 x 18 mm or 0.5 x 0.7 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.

Frequently Asked Questions

The size of an A12 paper is 13 x 18 mm

The size of an A12 paper in inches is 0.5 x 0.7 in

The half size of an A12 paper is 6.5 x 9 mm or 0.25 x 0.35 in

The aspect ratio of an A12 is 1:1.38

The area of an A12 paper is 234 mm or 0.35 in

The perimeter of an A12 paper is 62 mm or 2.40 in

The diagonal measurement of A12 paper is 22.20 mm or 0.86 in

Other A Paper Sizes →

There are a total of 19 A Paper Sizes.