I'm 6' 0" with a 31-32" waist and bought a medium. The short fits great, especially around my legs which are big. I have a pair of Sugoi RS in medium and everything fits great but the legs are really tight compared to the Louis Garneau. For road riding and mountain biking these shorts work great. I did buy them for cyclocross and for this usage, I wish the had silicone grippers on the thigh. The shorts ride up on the after a few remounts on the bike. Other than that I really like the cut and fit of the panels. Because of the laser welding vs stitching I'm hoping they last a very long time.