JB4 Paper Size, Dimensions and Format (Japanese series)

JB4 in millimetres

257 x 364 mm




Aspect ratio 1:1.42
Area (A) 93,548 mm²
Perimeter (P) 1,242 mm
Diagonal (d) 445.58 mm


The JB4 format measures 257 x 364 mm or inches. An JB4 paper fromat has an aspect ratio of 1:1.42. The Area of the JB4 paper size is 93,548 mm² or 144.43 in² with a perimeter of 1,242 mm or 48.80 in. An JB4 format has a diagonal length of 445.58 mm or 17.51 in. The JB4 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.