Japanese JIS B series
JIS B8 paper size
JIS B8 measures 64 x 91 mm (2.52 x 3.58 in). Part of the Japanese JIS B series.
64 x 91millimetres
2.52 x 3.58inches
756 x 1,075pixels @ 300 dpi
Dimensions in every unit
| Unit | Width x height |
|---|---|
| Millimetres | 64 x 91 mm |
| Centimetres | 6.4 x 9.1 cm |
| Inches (decimal) | 2.52 x 3.583 in |
| Inches (fraction) | 2 1/2 x 3 9/16 in |
| Points (1/72 in) | 181.4 x 258 pt |
| Picas | 15.12 x 21.5 pc |
Pixel dimensions by resolution
| Resolution | Pixels | Megapixels |
|---|---|---|
| 72 dpi | 181 x 258 px | 0 MP |
| 96 dpi | 242 x 344 px | 0.1 MP |
| 150 dpi | 378 x 537 px | 0.2 MP |
| 200 dpi | 504 x 717 px | 0.4 MP |
| 300 dpi | 756 x 1,075 px | 0.8 MP |
| 600 dpi | 1,512 x 2,150 px | 3.2 MP |
300 dpi is the usual target for printed photos and artwork; 72–96 dpi is screen resolution.
Document size with bleed
| Bleed | Millimetres | Inches |
|---|---|---|
| 3 mm bleed (each side) | 70 x 97 mm | 2.756 x 3.819 in |
| 0.125 in bleed (each side) | 70.4 x 97.4 mm | 2.77 x 3.833 in |
How many JIS B8 fit on a press sheet
| Sheet | Without bleed | With 3 mm bleed |
|---|---|---|
| A4 | 9-up | 9-up |
| A3 | 18-up | 18-up |
| SRA3 | 21-up | 18-up |
| Letter | 9-up | 6-up |
| Tabloid 11 x 17 in | 18-up | 12-up |
| 12 x 18 in | 21-up | 18-up |
| 13 x 19 in (Super B) | 25-up | 18-up |
| B2 (offset) | 55-up | 50-up |
| B1 (offset) | 110-up | 100-up |
Simple grid imposition with no gutters or gripper margin; real layouts may fit fewer.
Envelopes for JIS B8
| Fold | Folded size | Envelopes that fit |
|---|---|---|
| Unfolded | 64 x 91 mm | C7 envelope, C7/C6 envelope, #6¾ envelope |
| Folded in half | 45.5 x 64 mm | C8 envelope, C7 envelope |
| Folded in thirds | 30.3 x 64 mm | C8 envelope |
The √2 system
JIS B8 has an aspect ratio of 1 : 1.4219 — close to √2 (1.4142). Folding or cutting it in half across the long side produces the next smaller size in the series with the same proportions, and two sheets side by side form the next larger size. This is why scaling between sizes in the series (for example on a photocopier) never crops or distorts the page.
Similar sizes
Frequently asked questions
What are the dimensions of JIS B8?
JIS B8 is 64 x 91 mm, which is 2.52 x 3.58 in (2 1/2 x 3 9/16 in).
How many pixels is JIS B8 at 300 DPI?
756 x 1,075 pixels at 300 dpi, or 378 x 537 at 150 dpi.
Sources & data
- Dimensions per the relevant standard; see sources.