Height of B9 paper size: 44 mm. = 4.4 cm.
Width of B9 paper size: 62 mm. = 6.2 cm.
Dimensions of B9 in mm: 44 x 62 mm.
Dimensions of B9 in cm: 4.4 x 6.2 cm.
Dimensions of B9 in inches: 1.73″ x 2.44″
Graphic file dimensions in pixels for 300 DPI printing: 520 x 732 px.
Graphic file dimensions in pixels for 72 DPI printing: 125 x 176 px.