JB1 Paper Size, Dimensions and Format (Japanese series)

JB1 in millimetres

728 x 1030 mm




Aspect ratio 1:1.41
Area (A) 749,840 mm²
Perimeter (P) 3,516 mm
Diagonal (d) 1,261.30 mm


The JB1 format measures 728 x 1030 mm or inches. An JB1 paper fromat has an aspect ratio of 1:1.41. The Area of the JB1 paper size is 749,840 mm² or 1,165.22 in² with a perimeter of 3,516 mm or 138.60 in. An JB1 format has a diagonal length of 1,261.30 mm or 49.72 in. The JB1 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.