"I love these boyshorts! I wear a size 2 pants and got the XS/S. The fit in the back is low, but not too low - perfect under lowrise jeans. The front waistband is actually a bit high on me, but I'm very petite so that might not happen for others. These don't slip down or ride up in the back, and there are no seams or lines from elastic. The only thing you need to keep in mind is that the legs are bit long in the front and have a hem, which might show under tight or thin pants. Other than that, they're perfect. I wish they came in more colors/prints because I'd definitely buy several pair."