Jelt is a great solution for those who don't want their pants buttons protruding or protruding through their shirt. It's best to place the buckle off-center - to the right of the pant width - so the elastic on the back of the jelt can hold it securely over the pant button. I don't wear it when I tuck my shirt in - I have a couple of decorative belts that I wear when I want my belt to show. I wear jelt when I don't need a belt, but I need a slimmer profile when shirt is worn over pants. The elastic on the back is very imaginative. Great design work! I wear 8s and 10s in women's pants and bought a medium size. It fits well.