The Magento 2 Personalized Product Designer Extension supports a wide range of products including T-shirts, hoodies, phone cases, coffee mugs, pillow covers, photo frames, bags, stickers, shoes, caps, visiting cards, invitation cards, signs & posters, laptop skin covers, mouse pads, notebooks, journals, and calendars. Essentially, any product where you want to offer custom printing or personalization can be enabled through the designer studio.