ISO A series
A9 paper size
A9 measures 37 x 52 mm (1.46 x 2.05 in). Tickets, small labels.
37 x 52millimetres
1.46 x 2.05inches
437 x 614pixels @ 300 dpi
Dimensions in every unit
| Unit | Width x height |
|---|---|
| Millimetres | 37 x 52 mm |
| Centimetres | 3.7 x 5.2 cm |
| Inches (decimal) | 1.457 x 2.047 in |
| Inches (fraction) | 1 7/16 x 2 1/16 in |
| Points (1/72 in) | 104.9 x 147.4 pt |
| Picas | 8.74 x 12.28 pc |
Pixel dimensions by resolution
| Resolution | Pixels | Megapixels |
|---|---|---|
| 72 dpi | 105 x 147 px | 0 MP |
| 96 dpi | 140 x 197 px | 0 MP |
| 150 dpi | 219 x 307 px | 0.1 MP |
| 200 dpi | 291 x 409 px | 0.1 MP |
| 300 dpi | 437 x 614 px | 0.3 MP |
| 600 dpi | 874 x 1,228 px | 1.1 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) | 43 x 58 mm | 1.693 x 2.283 in |
| 0.125 in bleed (each side) | 43.4 x 58.4 mm | 1.707 x 2.297 in |
How many A9 fit on a press sheet
| Sheet | Without bleed | With 3 mm bleed |
|---|---|---|
| A4 | 32-up | 20-up |
| A3 | 64-up | 45-up |
| SRA3 | 72-up | 50-up |
| Letter | 28-up | 20-up |
| Tabloid 11 x 17 in | 56-up | 42-up |
| 12 x 18 in | 64-up | 50-up |
| 13 x 19 in (Super B) | 78-up | 56-up |
| B2 (offset) | 171-up | 132-up |
| B1 (offset) | 361-up | 276-up |
Simple grid imposition with no gutters or gripper margin; real layouts may fit fewer.
Envelopes for A9
| Fold | Folded size | Envelopes that fit |
|---|---|---|
| Unfolded | 37 x 52 mm | C9 envelope, C8 envelope |
| Folded in half | 26 x 37 mm | C9 envelope, C8 envelope |
| Folded in thirds | 17.3 x 37 mm | C10 envelope, C9 envelope, C8 envelope |
The √2 system
A9 has an aspect ratio of 1 : 1.4054 — 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 A9?
A9 is 37 x 52 mm, which is 1.46 x 2.05 in (1 7/16 x 2 1/16 in).
How many pixels is A9 at 300 DPI?
437 x 614 pixels at 300 dpi, or 219 x 307 at 150 dpi.
Sources & data
- Dimensions per the relevant standard; see sources.