Scaling up never adds detail

Designing at 1000 px and enlarging to 3600 makes the numbers look right while inventing every new pixel. The print comes back soft, and no filter recovers information that was never there.

Bleed is not optional on edge-to-edge prints

Cutting has tolerance. Without 0.125 inches of extra artwork past the trim line, a slightly off cut leaves a white sliver down one side of every sticker or poster.

Safe area protects your text

The same cutting tolerance works inwards. Anything closer than a bleed's width to the edge risks being trimmed off. Keep names, dates and logos inside the safe area.

Shape matters as much as size

A square design on a 12 x 16 inch print area gets cropped or floats with gaps. Match the aspect ratio from the beginning rather than fixing it at upload.

What size canvas should I design at for print on demand?

Multiply the print area in inches by 300. A 12 x 16 inch t-shirt print area needs a 3600 x 4800 pixel canvas. Starting at the final size means you never have to scale up later, which is where detail gets lost.

How do I convert inches to pixels for printing?

Pixels equal inches multiplied by DPI. At 300 DPI a 4 inch sticker needs 1200 pixels; at 150 DPI it only needs 600. There is no fixed conversion because it depends entirely on the resolution you are printing at.

What is bleed and do I need it?

Bleed is extra artwork extending past where the product gets cut, usually 0.125 inches on each side. Cutting is never perfectly accurate, so without bleed a slight misalignment leaves a thin white edge. You need it for anything printed edge to edge — stickers, posters, all-over prints — but not for a design floating in the middle of a t-shirt.

Why does Canva not let me set DPI?

Canva works purely in pixels and exports at whatever pixel dimensions your design has. That is fine for print as long as you set the canvas in pixels rather than inches. Use the pixel figure from this calculator and ignore DPI settings entirely in Canva.

Is 300 DPI always necessary?

No. 300 DPI is the standard for anything viewed up close — apparel, mugs, stickers, small prints. For large posters and canvases that people look at from several feet away, 150 DPI is generally fine and keeps file sizes manageable.