Japanese Paper Sizes

Further Information

The JIS defines two main series of paper sizes. The JIS A-series is identical to the ISO A-series, but with slightly different tolerances. The area of B-series paper is 1.5 times that of the corresponding A-paper (instead of the factor √2 = 1.414... for the ISO B-series), so the length ratio is approximately 1.22 times the length of the corresponding A-series paper. The aspect ratio of the paper is the same as for A-series paper. Both A- and B-series paper is widely available in Japan, Taiwan and China, and most photocopiers are loaded with at least A4 and either one of A3, B4 and B5 paper.

There are also a number of traditional paper sizes, which are now used mostly by printers. The most common of these old series are the Shiroku-ban and the Kiku paper sizes.

Source: Wikipedia

Format Width x Height (mm) Width x Height (in)
JB0 1030 x 1456 mm 40.6 x 57.3 in
JB1 728 x 1030 mm 28.7 x 40.6 in
JB2 515 x 728 mm 20.3 x 28.7 in
JB3 364 x 515 mm 14.3 x 20.3 in
JB4 257 x 364 mm 10.1 x 14.3 in
JB5 182 x 257 mm 7.2 x 10.1 in
JB6 128 x 182 mm 5 x 7.2 in
JB7 91 x 128 mm 3.6 x 5 in
JB8 64 x 91 mm 2.5 x 3.6 in
JB9 45 x 64 mm 1.8 x 2.5 in
JB10 32 x 45 mm 1.3 x 1.8 in
JB11 22 x 32 mm 0.9 x 1.3 in
JB12 16 x 22 mm 0.6 x 0.9 in
Shiroku ban 4 264 x 379 mm 10.4 x 14.9 in
Shiroku ban 5 189 x 262 mm 7.4 x 10.3 in
Shiroku ban 6 127 x 188 mm 5 x 7.4 in
Kiku 4 227 x 306 mm 8.9 x 12 in
Kiku 5 151 x 227 mm 5.9 x 8.9 in