I am 5'7 and 125lbs w a muscular bubble butt from climbing and biking. usually have trouble w shorts fitting right because my legs and waist don't match my butt. these shorts run large , i got a medium which should have been okay but they stretched out quite a bit after one wear so am returning for a small. it's crazy for my butt to be in a "small"anything. so- if you are a skinny minny, or have a flat butt, these may not work for you in that you don't have anything to hold these up besides the