I am a small adult, child size 14 usually fits me best. I ordered the XL (14-16) C9 2" woven jogging shorts and found them to be large enough. The outer shorts are cute and sit just below my natural waist and down to my leg just above mid-thigh (my inseam is 29.5).".) My only criticism of the inner pants. I've never had running tights that were so bulky in the crotch. Looking at them and my other shorts, there is definitely more ruffles and threads in this area. After I've worn them on some, I can ignore them for minutes, I just hope they don't annoy me for long stretches.