Promptkoi

AI Prompts for T-Shirt Design

A t-shirt design has to survive two brutal tests: it must read instantly from ten feet away, and it must separate cleanly from any shirt color. That means the best prompts prioritize contrast, a single focal graphic, and a transparent or solid background over detail. Simpler line art, bold typography, and one-or-two-color illustrations almost always beat photorealistic scenes when the design is printed on fabric. The prompt should also name the print method — screen print, DTG, or sublimation — because the color count and edge sharpness you need change with each. Every entry here includes the ratio and style we targeted, plus a note on why the graphic works on a shirt and how to adapt it for light versus dark garments.

Prompts in this collection

Frequently asked questions

What makes a design actually look good on a t-shirt?
Single focal graphic, high contrast against the shirt color, and readable from a distance. Avoid tiny detail and busy backgrounds; a transparent or solid background separates cleanly in a print shop. Vector-friendly styles like line art, badges, and distressed typography transfer best.
Do I need a transparent background for print-on-demand?
Yes. Most POD platforms require a PNG with a transparent background for DTG and screen-print uploads. Ask the model for the graphic on a 'solid white background' or 'transparent background' and remove the background in a design tool if needed.
What aspect ratio should a t-shirt design be?
A portrait 2:3 or 4:5 chest print works best, with the main art roughly 10–12 inches tall. Wide landscape designs can work across the chest but often shrink to unreadable detail on smaller shirts.

Related guides

How-tos and prompt collections that go deeper on t-shirt design.