if you're going to print at a store ask how they need the file (png or pdf) and the color profile (usually CMYK), and pick the paper of your preference

i've printed postcards and that's roughly what i've done with the canvas, good luck and feel free to ask anything! I'll try to help if i can ✨

for printing you need a high dpi (300-350) and measure your keychain holder to make sure the size fits! Example: if it measures 5 X 8 cm, the canvas size should be:

5 x 8 cm. 300 dpi

you can make it a bit bigger (like 3-5 mm extra) so the print bleeds and you can trim it to size after printing