A9 Paper Size
A9 paper measures 37 × 52 mm (1.46 × 2.05 in).
| Millimetres | 37 × 52 mm |
|---|---|
| Centimetres | 3.7 × 5.2 cm |
| Inches | 1.46 × 2.05 in |
| Aspect ratio (long ÷ short) | 1.405 |
| Relation | Half of A8 (fold or cut it across the long side to get A9) |
| Next size down | A10 is half of A9 |
| Series neighbours | B9 is a little larger; C9 is the envelope that fits it |
| Area | 0.0019 m² |
| Resolution | Width × height | Typical use |
|---|---|---|
| 72 PPI | 105 × 147 px | Screen design (PDF points) |
| 96 PPI | 140 × 197 px | Web / CSS pixels |
| 150 PPI | 219 × 307 px | Draft print quality |
| 300 PPI | 437 × 614 px | High-quality print |
| Paper weight | One sheet | 500 sheets (one ream) |
|---|---|---|
| 70 gsm | 0.13 g | 0.07 kg |
| 80 gsm | 0.15 g | 0.08 kg |
| 90 gsm | 0.17 g | 0.09 kg |
| 100 gsm | 0.19 g | 0.10 kg |
| 120 gsm | 0.23 g | 0.12 kg |
| 160 gsm | 0.31 g | 0.15 kg |
| Print onto | Scale |
|---|---|
| A5 paper | 400.0% |
| A4 paper | 567.6% |
| A3 paper | 802.7% |
| Letter paper | 537.3% |
| Legal paper | 583.5% |
| Size | Sheets | Dimensions |
|---|---|---|
| A10 | 2 | 26 × 37 mm |
Where you will see A9
A9 is rarely printed on its own. It is mostly useful as a reference point in the series and for very small labels and stickers.
About A9
A9 belongs to the ISO 216 A series. Every A size has the same proportions (1 : √2, about 1.414), so folding or cutting a sheet across its long side gives the next size down with the same shape. Its area is 0.0019 square metres.
Frequently asked questions
What are the dimensions of A9 paper?
A9 paper is 37 × 52 mm (1.46 × 2.05 inches).
How many pixels is A9?
At 300 PPI, A9 is 437 × 614 pixels. At 72 PPI it is 105 × 147 pixels. The number depends on the resolution you choose; use the paper size converter for any PPI.
How much does a sheet of A9 paper weigh?
It depends on the paper weight. At 80 gsm a single A9 sheet weighs 0.15 g, and a ream of 500 sheets weighs 0.08 kg. See how paper weight works.
How many smaller sheets can I get from one A9?
Because each A size is half of the previous one, one A9 sheet gives you 2 × A10.
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Last updated: 2026-10-03