Dimensions of C8 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 C8 format: 81 mm = 8,1 cm
Width of C8 format: 57 mm = 5,7 cm

Dimensions of C8 format in mm: 57 x 81 mm
Dimensions of C8 format in cm: 5,7 x 8,1 cm
Dimensions of C8 format in inches: 2,24" x 3,19"

Print ready file dimensions in pixels at 300 DPI: 673 x 957 px
Print ready file dimensions in pixels at 72 DPI: 162 x 230 px