16 products to sell printed with images besides T-shirts
It would be good to have something that you would see regularly and also something where you might buy a set or at least more than one. https://printify.com/ has a huge catalog of these items.
(Very clever "instant Generate" AI image!)
If you have 12 or 365 images with a particular theme
2. Coffee mugs/Travel Cups
3. Mouse Pads
4. Drink Coasters
6. Bumper stickers and stickers in general
I saw someone selling stickers with different states of the USA at the airport to put on your luggage so you could recognize it: clever!