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# Japanese Paper Sizes

The Japanese Industrial Standards organisation (JIS (opens new window)) has defined two paper size series the JIS A, that is the same as ISO 216 A size with minor differences in tolerances. JIS B series paper is not the same as ISO 216 B series paper, with the JIS B sizes having an area of 1.5 times the A paper size rather than the root 2 times the size in ISO 216.

# Table of JIS B Paper Sizes From B0 to B10

Size Width x Height (mm) Width x Height (in)
B0 1030 x 1456 mm 40.6 x 57.3 in
B1 728 x 1030 mm 28.7 x 40.6 in
B2 515 x 728 mm 20.3 x 28.7 in
B3 364 x 515 mm 14.3 x 20.3 in
B4 257 x 364 mm 10.1 x 14.3 in
B5 182 x 257 mm 7.2 x 10.1 in
B6 128 x 182 mm 5.0 x 7.2 in
B7 91 x 128 mm 3.6 x 5.0 in
B8 64 x 91 mm 2.5 x 3.6 in
B9 45 x 64 mm 1.8 x 2.5 in
B10 32 x 45 mm 1.3 x 1.8 in

# Traditional Paper Sizes

There are a number of older paper sizes still in use by printers in Japan, these include Shirokuban and Kiku sizes.

# Shirokuban Sizes

Length x Height (mm) Length x Height (in) Aspect Ratio
264 x 379 mm 10.39 x 14.92 in 1:1.4356
189 x 262 mm 7.44 x 10.31 in 1:1.3862
127 x 188 mm 5.00 x 7.40 in 1:1.4803

The sizes for Shirokuban are not fixed and may vary slightly between producers.

# Kiku Sizes

Length x Height (mm) Length x Height (in) Aspect Ratio
227 x 306 mm 8.94 x 12.05 in 1:1.3480
151 x 227 mm 5.94 x 8.94 in 1:1.5033

# Other Paper Sizes Found In Japan

There are a number of other paper sizes that are in use in Japan. AB format has the short side of A4 and the long side of B5. B40 size is 80% of the size of B5.

Size Length x Height (mm) Length x Height (in) Aspect Ratio
AB 210 x 257 mm 8.27 x 10.12 in 1:1.2238
B40 103 x 182 mm 4.06 x 7.17 in 1:1.7670
Shikisen 84 x 148 mm 3.31 x 5.83 in 1:1.7619

reference (opens new window)