JB9 Paper Size, Dimensions and Format (Japanese series)

JB9 in millimeters

45 x 64




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 1.8 x 2.5 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.

Frequently Asked Questions:

The size of an JB9 paper is 45 x 64 mm

The size of an JB9 paper in inches is 1.8 x 2.5 in

The half size of an JB9 paper is 22.5 x 32 mm or 0.9 x 1.25 in

The aspect ratio of an JB9 is 1:1.42

The area of an JB9 paper is 2,880 mm or 4.50 in

The perimeter of an JB9 paper is 218 mm or 8.60 in

The diagonal measurement of JB9 paper is 78.24 mm or 3.08 in

Other Japanese Paper Sizes

There are a total of 18 Japanese Paper Sizes.