JB7 Paper Size, Dimensions and Format (Japanese series)


91 x 128




Aspect ratio 1:1.41
Perimeter (P) 438 mm
Diagonal (d) 157.05 mm
Area (A) 11,648 mm²


The JB7 format measures 91 x 128 mm or 3.6 x 5 inches. An JB7 paper fromat has an aspect ratio of 1:1.41. The Area of the JB7 paper size is 11,648 mm² or 18 in² with a perimeter of 438 mm or 17.20 in. An JB7 format has a diagonal length of 157.05 mm or 6.16 in. The JB7 size belongs to the Japanese series. In the Japanese series there are a total of 18 paper sizes.

Frequently Asked Questions

The size of an JB7 paper is 91 x 128 mm

The size of an JB7 paper in inches is 3.6 x 5 in

The half size of an JB7 paper is 45.5 x 64 mm or 1.8 x 2.5 in

The aspect ratio of an JB7 is 1:1.41

The area of an JB7 paper is 11,648 mm or 18 in

The perimeter of an JB7 paper is 438 mm or 17.20 in

The diagonal measurement of JB7 paper is 157.05 mm or 6.16 in

Other Japanese Paper Sizes →

There are a total of 18 Japanese Paper Sizes.