Poster Sizes A0 to A4
ISO sizes from desk-friendly A4 to feature-wall A0 — exact dimensions and the pixel counts that keep type and photos sharp.
Upload Your Poster SizeQuick answer: A4 is 8.3×11.7 in (210×297 mm), A3 is 11.7×16.5 in, A2 is 16.5×23.4 in, A1 is 23.4×33.1 in, and A0 is 33.1×46.8 in. At 300 DPI, A3 needs about 3508×4961 pixels (portrait). PrintPosters prints these on 170–300 GSM art paper From ₹158.
ISO A-series posters share one ratio: each step up doubles the area. That makes A4 a natural proof size, A3 the everyday event and bedroom format, and A1–A0 the sofa-scale sheets Indian living rooms actually hang. Before you export from Canva or Photoshop, match the print size to the wall — a single poster should sit at roughly two-thirds of the furniture width below it. Then convert inches × 300 to get a safe pixel target. PrintPosters.in checks resolution on upload so a 1200-pixel phone crop is not forced onto A0. Custom sheets go up to 54×96 in when ISO sizes are too small for a lobby or retail wall.
A-series dimensions and pixels at 300 DPI
| Size | Inches | Millimetres | Portrait pixels @300 DPI |
|---|---|---|---|
| A4 | 8.3 × 11.7 | 210 × 297 | 2480 × 3508 |
| A3 | 11.7 × 16.5 | 297 × 420 | 3508 × 4961 |
| A2 | 16.5 × 23.4 | 420 × 594 | 4961 × 7016 |
| A1 | 23.4 × 33.1 | 594 × 841 | 7016 × 9921 |
| A0 | 33.1 × 46.8 | 841 × 1189 | 9921 × 14031 |
Which ISO size fits the room
- A4 — pinboards, menus, desk frames, and first proofs
- A3 — bedrooms, café boards, and the most ordered event size in India
- A2 — hallways, studios, and photography that outgrew A3
- A1 — above a three-seater sofa or queen bed
- A0 — retail, exhibitions, and large feature walls
Frequently Asked Questions
Do I need 300 DPI for every poster size?
300 DPI is the safe target for close viewing and small type. Large A1–A0 posters viewed from several feet can look sharp at 150–200 DPI if the file is clean.
Is 24×36 the same as A1?
No. A1 is 23.4×33.1 in; 24×36 is a US-style sheet, slightly taller and a bit wider. Use our room preview if you are choosing between them.
What is the largest poster you print?
Standard ISO runs through A0. Custom widths go up to 54×96 in — upload the file and we confirm feasibility before checkout.
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