I'm 6'2" 200 lbs with an athletic body and generally wear 34x34 pants. Went with the Large size and the fit is exactly what I was looking for. These are super comfortable joggers and have a lot of stretch as well. The only thing I wish was that they had a version that had a higher polyester content as opposed to the 70/30 cotton/poly that these are made of. The high cotton content means they can get pretty soaked when working out.