I wear a very large belt and I probably have more belly hanging over the belt than it should [probably not actually] . I like to wear the belt for about 3 hours a day or when I have to stand all day, but after 4 hours or more it bites my stomach. Now I avoid those belts. Since one size fits all, I will give it to one of my sons who has no tummy at all. So if you buy clothes in Big and Tall and are either not tall or not both tall and tall, get a pass for these belts. Otherwise amazing.