Size guide
Poster Size
Standard poster sizes: 18×24, 24×36 inches in the US; A3-A0 internationally. Pixel dimensions at 300 DPI for each, plus an AI poster maker.
Make a posterGenerate print-ready poster art.The right size, explained
The most common poster sizes are 18×24 inches (small), 24×36 inches (standard large, the classic "movie poster" retail size) in the US, and A3 (297×420mm) to A0 internationally. For print, design at 300 DPI — a 24×36 poster is 7200×10800 pixels.
For digital display (events pages, social) you can work much smaller, but for anything printed, resolution decides whether it looks professional or fuzzy at arm's length.
Generate a poster with AI, then upscale to print resolution — the upscaler gets a web-size design to print-ready without redrawing.
Exact specifications
| Feature | Details |
|---|---|
| Small (US) | 18 × 24 in — 5400 × 7200 px @300 DPI |
| Standard large (US) | 24 × 36 in — 7200 × 10800 px @300 DPI |
| One-sheet (movie) | 27 × 40 in |
| A3 | 297 × 420 mm — 3508 × 4961 px @300 DPI |
| A2 / A1 / A0 | 420×594 / 594×841 / 841×1189 mm |
| Print resolution | 300 DPI (150 DPI acceptable for large-format viewed at distance) |
Make your poster
Design it with AI, upscale it to print resolution.
Frequently asked questions
What is the standard poster size?+
24×36 inches in the US retail standard; 18×24 for smaller displays; A-series (A3-A0) in most other countries.
What resolution does a printed poster need?+
300 DPI for close viewing. Large-format posters viewed from a distance can go down to 150 DPI without visible loss.
Can I print an AI-generated poster?+
Yes — generate the design, then run it through the AI upscaler to reach print resolution. Commercial use of what you generate is allowed.