I'm 6'2" 210lbs and the Large fits perfect. Great jacket on its own or perfect compliment underneath my Marmot Aegis. This piece of gear has made it on top of my checklist for every trip.
Have worn it running in 20 degree Wisconsin winters (over the top of a baselayer) and the driclime fleece kept me warm...
Very versatile piece of gear for any type of scenario, and for anytype of weather.