Our compression shorts (both Pro and Midnight models) come down to just above the knee, in order to prevent any rash that occurs on the lower part of the thigh and knee where it can be the worst. Due to the high stretch content of our material and waistband, you will most likely fit into multiple sizes. We usually say if you're a 34 waist and trying to choose between Medium and Large, go with Medium if you're under 5'10", and Large if you're 5'11" or taller. Same goes for Small/Medium at a waist of 31, but use 5'5" as a cutoff point. Size Small comfortably fits adolescents and most women looking for a shorter leg.