C9 Paper Size, Dimensions and Format (C series)

C9 in millimeters

40 x 57




Aspect ratio 1:1.43
Area (A) 2,280 mm²
Perimeter (P) 194 mm
Diagonal (d) 69.63 mm


The C9 format measures 40 x 57 mm or 1.6 x 2.2 inches. An C9 paper fromat has an aspect ratio of 1:1.43. The Area of the C9 paper size is 2,280 mm² or 3.52 in² with a perimeter of 194 mm or 7.60 in. An C9 format has a diagonal length of 69.63 mm or 2.72 in. The C9 size belongs to the C series. In the C series there are a total of 11 paper sizes.

Frequently Asked Questions:

The size of an C9 paper is 40 x 57 mm

The size of an C9 paper in inches is 1.6 x 2.2 in

The half size of an C9 paper is 20 x 28.5 mm or 0.8 x 1.1 in

The aspect ratio of an C9 is 1:1.43

The area of an C9 paper is 2,280 mm or 3.52 in

The perimeter of an C9 paper is 194 mm or 7.60 in

The diagonal measurement of C9 paper is 69.63 mm or 2.72 in

Other C Paper Sizes

There are a total of 11 C Paper Sizes.