JB9 Paper Size, Dimensions and Format (Japanese series)

JB9 in millimetres

45 x 64 mm




Aspect ratio 1:1.42
Area (A) 2,880 mm²
Perimeter (P) 218 mm
Diagonal (d) 78.24 mm


The JB9 format measures 45 x 64 mm or inches. An JB9 paper fromat has an aspect ratio of 1:1.42. The Area of the JB9 paper size is 2,880 mm² or 4.50 in² with a perimeter of 218 mm or 8.60 in. An JB9 format has a diagonal length of 78.24 mm or 3.08 in. The JB9 size belongs to the Japanese series. In the Japanese series there are a total of 18 paper sizes.

Other Japanese Paper Sizes

There are a total of 18 Japanese Paper Sizes.