Japanese Paper Sizes
The Japanese Industrial Standards organisation (JIS) 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 |
