i'm 5'6"/120 and have a size S jiberish/level 1 hoody. all i can say is it's the most gangsta size S i've ever owned... but then again i'm a girl. sleeves are a tiny bit longer than the average S hoody - prolly somewhere in the S/M range. body is pretty damn baggy on me b/c i'm skinny, but i think it'd run roomy but not absolutely massive on a guy. length, as the other guy said, is like a tall tee. i'd say it falls almost 2/3 of the way down my thigh. hope that helps..