Dimensions of C9 format

C series of paper sizes is defined by ISO 2016.

The height divided by the width of all formats
of A, B and C series is the square root of two (1.4142).

Height of C9 format: 57 mm = 5,7 cm
Width of C9 format: 40 mm = 4,0 cm

Dimensions of C9 format in mm: 40 x 57 mm
Dimensions of C9 format in cm: 4,0 x 5,7 cm
Dimensions of C9 format in inches: 1,57" x 2,24"

Print ready file dimensions in pixels at 300 DPI: 472 x 673 px
Print ready file dimensions in pixels at 72 DPI: 113 x 162 px