Preparing artwork for posters and wall art in multiple sizes

Choose the print sizes before preparing the final artwork. Build a canvas or artboard for each size, then check its pixel dimensions, crop and safe area; framed and unframed products may use different print surfaces.

Use the chosen product template

Set up a canvas or artboard for each intended size, using its physical dimensions or pixel dimensions. Start with the best original file available: resampling to change the pixel count is not recommended and may not give the best result.

Approximate pixel dimensions include 8×10 inches at 2400×3000 pixels, 11×14 at 3300×4200, 12×18 at 3600×5400 and 16×20 at 4800×6000.

Further examples are 16×24 at 4800×7200 pixels, 20×30 at 6000×9000, 24×36 at 7200×10800, 30×40 at 9000×12000 and 32×48 at 9600×14400.

Larger examples are 36×48 at 10800×14400 pixels, 40×60 at 12000×18000 and 48×72 at 14400×21600. Treat these as approximate dimensions and check the requirements for the chosen product and size.

A rule of thumb gives 150–200 DPI for small prints (8×10 or smaller), 200–240 DPI for medium prints (around 16×24) and 240–300 DPI for large wall art (24×36 or larger). Adobe describes 300 ppi as standard for a printed image; check effective resolution at final print dimensions and follow the chosen product’s requirements.

Follow the current Printful file guidelines and product template for the chosen product and size. Keep small text and essential marks inside safe zones, away from the trim edge, and check the uploaded preview at each size for unintended crops or borders.

Check whether the provider requests a particular colour profile, and review colour on a calibrated workflow if available. Illuminated screens and printed paper show colour differently, so inspect a print sample if colour matching matters.

JPEG is common for photography; use the highest-quality export setting. PNG suits graphics or images with transparency, while TIFF is a high-quality option for professional printing but creates larger files; check that the provider accepts your chosen format.

Name each final file by size and version. When the proportions or crop change between sizes, inspect each size’s preview rather than relying on one export.

File Format Options for Poster Artwork

Treat fulfilment as part of the product

Confirm whether the chosen product is a loose poster, framed print or canvas. Packaging and shipping can differ, so check the provider’s details for that product and destination.

Order a sample in the largest size you plan to offer; 48×72 is the largest size in the examples above. Inspect the edges, paper finish, alignment and any damage on arrival.

A mock-up shows layout intent, not final print quality. If you revise the design after publishing, verify the live product file too.