ISO B series
B9 paper size
B9 measures 44 x 62 mm (1.73 x 2.44 in). Part of the ISO B series.
44 x 62millimetres
1.73 x 2.44inches
520 x 732pixels @ 300 dpi
Dimensions in every unit
| Unit | Width x height |
|---|---|
| Millimetres | 44 x 62 mm |
| Centimetres | 4.4 x 6.2 cm |
| Inches (decimal) | 1.732 x 2.441 in |
| Inches (fraction) | 1 3/4 x 2 7/16 in |
| Points (1/72 in) | 124.7 x 175.7 pt |
| Picas | 10.39 x 14.65 pc |
Pixel dimensions by resolution
| Resolution | Pixels | Megapixels |
|---|---|---|
| 72 dpi | 125 x 176 px | 0 MP |
| 96 dpi | 166 x 234 px | 0 MP |
| 150 dpi | 260 x 366 px | 0.1 MP |
| 200 dpi | 346 x 488 px | 0.2 MP |
| 300 dpi | 520 x 732 px | 0.4 MP |
| 600 dpi | 1,039 x 1,465 px | 1.5 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) | 50 x 68 mm | 1.969 x 2.677 in |
| 0.125 in bleed (each side) | 50.4 x 68.4 mm | 1.982 x 2.691 in |
How many B9 fit on a press sheet
| Sheet | Without bleed | With 3 mm bleed |
|---|---|---|
| A4 | 18-up | 16-up |
| A3 | 36-up | 32-up |
| SRA3 | 50-up | 36-up |
| Letter | 18-up | 16-up |
| Tabloid 11 x 17 in | 36-up | 32-up |
| 12 x 18 in | 42-up | 36-up |
| 13 x 19 in (Super B) | 50-up | 42-up |
| B2 (offset) | 128-up | 100-up |
| B1 (offset) | 256-up | 200-up |
Simple grid imposition with no gutters or gripper margin; real layouts may fit fewer.
Envelopes for B9
| Fold | Folded size | Envelopes that fit |
|---|---|---|
| Unfolded | 44 x 62 mm | C8 envelope, C7 envelope |
| Folded in half | 31 x 44 mm | C9 envelope, C8 envelope |
| Folded in thirds | 20.7 x 44 mm | C9 envelope, C8 envelope |
The √2 system
B9 has an aspect ratio of 1 : 1.4091 — 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 B9?
B9 is 44 x 62 mm, which is 1.73 x 2.44 in (1 3/4 x 2 7/16 in).
How many pixels is B9 at 300 DPI?
520 x 732 pixels at 300 dpi, or 260 x 366 at 150 dpi.
Sources & data
- Dimensions per the relevant standard; see sources.