A1 is 594 × 841 mm, which is 59.4 × 84.1 cm or 23.4 × 33.1 inches. It's twice the size of A2 and half the size of A0, and it's a popular size for large posters and statement art prints. Framed, an A1 print comes out at roughly 63 × 88 cm to 69 × 94 cm on the wall.
Below you'll find A1 in every unit, how it compares with the sizes it gets confused with, and how big it looks once it's framed and hanging.
In this guide
A1 dimensions in every unit
| Unit | Width × height (portrait) |
|---|---|
| Millimetres | 594 × 841 mm |
| Centimetres | 59.4 × 84.1 cm |
| Inches | 23.4 × 33.1 in (23.39 × 33.11 to two decimals) |
| Area | 0.5 m², half a square metre |
In landscape it's 841 × 594 mm. The shape stays the same.
A1 compared with the other A sizes
| Size | Millimetres | Compared with A1 |
|---|---|---|
| A4 | 210 × 297 | An eighth of A1 |
| A3 | 297 × 420 | A quarter of A1 |
| A2 | 420 × 594 | Half of A1 |
| A1 | 594 × 841 | - |
| A0 | 841 × 1189 | Twice A1 |
Sizes that look like A1 but aren't
| Size | Centimetres | Difference from A1 |
|---|---|---|
| 60 x 80 cm | 60 × 80 | 0.6 cm wider, 4.1 cm shorter |
| 60 x 90 cm | 60 × 90 | 0.6 cm wider, 5.9 cm taller |
| 24 x 36 inches (US poster) | 61 × 91.4 | 1.6 cm wider, 7.3 cm taller |
| 70 x 100 cm | 70 × 100 | 10.6 cm wider, 15.9 cm taller |
The widths are all close to A1, which is why these get mixed up, but the heights differ by several centimetres. A 24 x 36 inch US poster won't go into an A1 frame. Our picture frame size chart covers the rest.
A1 in pixels, for printing
| Resolution | A1 in pixels (portrait) |
|---|---|
| 300 ppi (high quality) | 7016 × 9933 px |
| 150 ppi (posters) | 3508 × 4967 px |
| 72 ppi (screen only) | 1684 × 2384 px |
A1 prints are normally seen from across a room, so 150 ppi usually prints well. Our pixels to print size calculator will check a specific file.
How big an A1 print looks framed
| Moulding width | Outside size of an A1 frame |
|---|---|
| Slim, 20 mm | About 63.4 × 88.1 cm |
| Medium, 35 mm | About 66.4 × 91.1 cm |
| Wide, 50 mm | About 69.4 × 94.1 cm |
A framed A1 is a proper statement piece. On its own it suits a sideboard, a console table, a bed or a chimney breast, and a pair of A1 frames side by side fills the wall above a large sofa. Because it's heavy, use fixings that suit your wall; our guide to how to hang a picture explains which to use.
Which frame for an A1 print?
| The look you want | Frame | Mount border |
|---|---|---|
| Print fills the frame, no mount | A1 frame | None |
| A1 print with a mount | 70 x 100 cm frame | About 5.3 cm at the sides, 8 cm top and bottom |
| A1 print with a deep mount | A0 frame | About 12.4 cm at the sides, 17.4 cm top and bottom |
| A2 print with a mount, in an A1 frame | A1 frame | About 8.7 cm at the sides, 12.4 cm top and bottom |
For an exactly even border, our custom-cut mounts can be made to any width.
See it before you buy. On any of our A1 frames, tap Preview Your Own Artwork and upload a photo of your print to see it in the frame.
Key takeaways
- A1 is 594 × 841 mm, 59.4 × 84.1 cm, or 23.4 × 33.1 inches.
- A1 is twice A2 and half A0, and covers half a square metre.
- 24 x 36 inches and 60 x 90 cm are taller than A1 and won't fit an A1 frame.
- At 150 ppi, an A1 print needs about 3508 × 4967 pixels.
- For an A1 print with a mount, a 70 x 100 cm frame gives a neat border.
Common questions
How big is A1 in cm?
59.4 × 84.1 cm.
What is A1 size in inches?
23.4 × 33.1 inches (23.39 × 33.11 inches to two decimal places).
Is A1 bigger than A2?
Yes. A1 is twice the size of A2.
Is A1 the same as 24 x 36 inches?
No. 24 x 36 inches (61 × 91.4 cm) is slightly wider and 7.3 cm taller than A1.
What size frame do I need for an A1 print?
An A1 frame if you want the print to fill it. For a mount, a 70 x 100 cm frame or an A0 frame.
What size is A1 in pixels?
7016 × 9933 pixels at 300 ppi, or 3508 × 4967 pixels at 150 ppi.
More size guides: A2 size, A0 size and the full picture frame size chart.
Browse our A1 picture frames, handmade to order by Guild Certified Framers.
About the author: Trevor Beers
Trevor Beers is a guest writer for East Side Studio London. With two degrees in English language and a passion for contemporary art, he explores the intersections of culture, criticism, and collecting. Splitting his time between London and Austin, Trevor brings an academic eye to emerging art scenes, offering thoughtful perspectives on today's evolving art landscape.
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