Initially ordered the large due to another reviewer saying they came up small. I’m a 5’ 7” male with 33” waist, and the waist of the large gaped at the back, so definitely didn’t come up small. Exchanged for the medium, and they fit perfectly. Although I do see where the other reviewer was coming from, as the inner brief lining does feel on the slightly tighter fit than I’m used to. All in all, I’m really happy with the purchase as the back zip pocket is perfectly for runners such as myself who doesn’t carry too many items barring keys and energy gels.