Design / Print on Demand / Poster A3
Poster A3 Maker
Prepare artwork for T-shirts, hoodies, mugs, posters, canvas and tote bags. Export transparent PNGs at print resolution and check them against your print provider’s template before upload.
297 × 420 mm (11.69 × 16.54 in)✓ size checked 2026-10-29PDFPNGJPGSVG
Poster A3 size and file specs
| Size | 297 × 420 mm (11.69 × 16.54 in) |
|---|---|
| Pixels for print | 3508 × 4961 px at 300 DPI |
| Bleed | 4 mm on each side |
| Safe area | keep text 3 mm inside the trim |
| Colour | RGB (sRGB); print shops convert to CMYK |
| Export | PDF, PNG, JPG, SVG |
| Print providers | Gelato |
| Source | official help page, checked 2026-10-29 |
How to make a poster a3
- Click Start designing — the studio opens a 297 × 420 mm canvas with bleed and safe-area guides.
- Pick a template or start blank. Add text, shapes, your logo, a QR code or images; your brand kit keeps colours and fonts.
- Open the Check tab: it flags text outside the safe area, low-resolution images, small text and trademark terms.
- Download PDF / PNG / JPG / SVG.
Why use Craftmark Studio
- Transparent PNG export for apparel, so the fabric colour shows through.
- Mug wraps show the handle area; posters include 4 mm bleed as recommended by Gelato.
- Large posters are exported within browser memory limits, with the DPI shown on every file.
- Works in the browser on desktop; projects are saved locally and can be backed up to a file.
Questions
What size is a poster a3?
The canvas opens at 297 × 420 mm (11.69 × 16.54 in). For print that is 3508 × 4961 px at 300 DPI.
Do I need bleed?
Yes. Backgrounds should extend 4 mm past the trim on every side so no white edge appears after cutting. The studio shows the bleed as a green dashed line and keeps it out of the way on screen.
Which file should I upload to my print provider?
Use “PNG — transparent background” for apparel and bags so the fabric colour shows through. Print areas vary by provider and size, so compare with the provider’s template before publishing.
Is it really free?
Yes. No sign-up, no watermark and no payment. Your designs stay in your own browser and are not uploaded to our server.
Can I sell products made with it?
Yes, designs you create are yours to sell. Do not use trademarked names, characters or logos you do not have rights to; the studio’s check panel warns about common ones.