A9 Paper Size, Dimensions and Format (A series)

A9 in millimetres

37 x 52 mm




Aspect ratio 1:1.41
Area (A) 1,924 mm²
Perimeter (P) 178 mm
Diagonal (d) 63.82 mm


The A9 format measures 37 x 52 mm or inches. An A9 paper fromat has an aspect ratio of 1:1.41. The Area of the A9 paper size is 1,924 mm² or 3 in² with a perimeter of 178 mm or 7 in. An A9 format has a diagonal length of 63.82 mm or 2.50 in. The A9 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.