Japanese JIS B series
JIS B7 paper size
JIS B7 measures 91 x 128 mm (3.58 x 5.04 in). Part of the Japanese JIS B series.
91 x 128millimetres
3.58 x 5.04inches
1,075 x 1,512pixels @ 300 dpi
Dimensions in every unit
| Unit | Width x height |
|---|---|
| Millimetres | 91 x 128 mm |
| Centimetres | 9.1 x 12.8 cm |
| Inches (decimal) | 3.583 x 5.039 in |
| Inches (fraction) | 3 9/16 x 5 1/16 in |
| Points (1/72 in) | 258 x 362.8 pt |
| Picas | 21.5 x 30.24 pc |
Pixel dimensions by resolution
| Resolution | Pixels | Megapixels |
|---|---|---|
| 72 dpi | 258 x 363 px | 0.1 MP |
| 96 dpi | 344 x 484 px | 0.2 MP |
| 150 dpi | 537 x 756 px | 0.4 MP |
| 200 dpi | 717 x 1,008 px | 0.7 MP |
| 300 dpi | 1,075 x 1,512 px | 1.6 MP |
| 600 dpi | 2,150 x 3,024 px | 6.5 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) | 97 x 134 mm | 3.819 x 5.276 in |
| 0.125 in bleed (each side) | 97.4 x 134.4 mm | 3.833 x 5.289 in |
How many JIS B7 fit on a press sheet
| Sheet | Without bleed | With 3 mm bleed |
|---|---|---|
| A4 | 4-up | 4-up |
| A3 | 9-up | 9-up |
| SRA3 | 9-up | 9-up |
| Letter | 4-up | 4-up |
| Tabloid 11 x 17 in | 9-up | 8-up |
| 12 x 18 in | 10-up | 9-up |
| 13 x 19 in (Super B) | 10-up | 9-up |
| B2 (offset) | 25-up | 25-up |
| B1 (offset) | 50-up | 50-up |
Simple grid imposition with no gutters or gripper margin; real layouts may fit fewer.
Envelopes for JIS B7
| Fold | Folded size | Envelopes that fit |
|---|---|---|
| Unfolded | 91 x 128 mm | A2 envelope, C6 envelope, Monarch envelope |
| Folded in half | 64 x 91 mm | C7 envelope, C7/C6 envelope, #6¾ envelope |
| Folded in thirds | 42.7 x 91 mm | C7 envelope |
The √2 system
JIS B7 has an aspect ratio of 1 : 1.4066 — 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 B7?
JIS B7 is 91 x 128 mm, which is 3.58 x 5.04 in (3 9/16 x 5 1/16 in).
How many pixels is JIS B7 at 300 DPI?
1,075 x 1,512 pixels at 300 dpi, or 537 x 756 at 150 dpi.
Sources & data
- Dimensions per the relevant standard; see sources.