Sizing can differ from product to product. For specific info, check the sizing section on the product in which you are interested.
The elastic laces and general flexibility of TIME slippers allow the uppers to form to your feet. Your slippers should feel slightly tight at first. After about two weeks of use, the uppers will relax and mold to your foot for a perfect fit. Do not go up or down more than a half-size away from your average size in other brands