ISO B series
B1 paper size
B1 measures 707 x 1000 mm (27.83 x 39.37 in). Posters.
707 x 1000millimetres
27.83 x 39.37inches
8,350 x 11,811pixels @ 300 dpi
Dimensions in every unit
| Unit | Width x height |
|---|---|
| Millimetres | 707 x 1000 mm |
| Centimetres | 70.7 x 100 cm |
| Inches (decimal) | 27.835 x 39.37 in |
| Inches (fraction) | 27 13/16 x 39 3/8 in |
| Points (1/72 in) | 2004.1 x 2834.6 pt |
| Picas | 167.01 x 236.22 pc |
Pixel dimensions by resolution
| Resolution | Pixels | Megapixels |
|---|---|---|
| 72 dpi | 2,004 x 2,835 px | 5.7 MP |
| 96 dpi | 2,672 x 3,780 px | 10.1 MP |
| 150 dpi | 4,175 x 5,906 px | 24.7 MP |
| 200 dpi | 5,567 x 7,874 px | 43.8 MP |
| 300 dpi | 8,350 x 11,811 px | 98.6 MP |
| 600 dpi | 16,701 x 23,622 px | 394.5 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) | 713 x 1006 mm | 28.071 x 39.606 in |
| 0.125 in bleed (each side) | 713.4 x 1006.4 mm | 28.085 x 39.62 in |
How many B1 fit on a press sheet
| Sheet | Without bleed | With 3 mm bleed |
|---|---|---|
| B1 (offset) | 1-up | 0-up |
Simple grid imposition with no gutters or gripper margin; real layouts may fit fewer.
The √2 system
B1 has an aspect ratio of 1 : 1.4144 — 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 B1?
B1 is 707 x 1000 mm, which is 27.83 x 39.37 in (27 13/16 x 39 3/8 in).
How many pixels is B1 at 300 DPI?
8,350 x 11,811 pixels at 300 dpi, or 4,175 x 5,906 at 150 dpi.
Sources & data
- Dimensions per the relevant standard; see sources.