I. love. these. shorts. They have enough stretch to fit over any body within the height measurements, but they still hold their shape and never get saggy during class. I have other knit shorts in my collection, including the new Bloch shorts and the Body Wrappers stripped shorts from Discount Dance, but these are the ones I go to again and again. They stay put all through class--no adjustment needed from one exercise to the next like with some of the other knit shorts that stretch out as class goes on. And they have just the right amount of warmth for my hip muscles to stay loose throughout class on those colder winter evenings when the studio isn't very warm. For reference, I'm an older, non-professional adult ballet dancer with a non-conventional, hour-glass shape. I wear size 12 in street pants and the medium size (based on my height) fits me perfectly in these shorts.