A13 Paper Size, Dimensions and Format (A series)

A13 in millimeters

9 x 13




Aspect ratio 1:1.45
Area (A) 117 mm²
Perimeter (P) 44 mm
Diagonal (d) 15.81 mm


The A13 format measures 9 x 13 mm or 0.4 x 0.5 inches. An A13 paper fromat has an aspect ratio of 1:1.45. The Area of the A13 paper size is 117 mm² or 0.20 in² with a perimeter of 44 mm or 1.80 in. An A13 format has a diagonal length of 15.81 mm or 0.64 in. The A13 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 A13 paper is 9 x 13 mm

The size of an A13 paper in inches is 0.4 x 0.5 in

The half size of an A13 paper is 4.5 x 6.5 mm or 0.2 x 0.25 in

The aspect ratio of an A13 is 1:1.45

The area of an A13 paper is 117 mm or 0.20 in

The perimeter of an A13 paper is 44 mm or 1.80 in

The diagonal measurement of A13 paper is 15.81 mm or 0.64 in

Other A Paper Sizes

There are a total of 19 A Paper Sizes.