I didn't end up keeping this, and i feel like i might regret it. ;) i have a similar sweater. this jacket is super streamlined with a sleek fit. the bummer for me was that it didn't have snaps to hold the collar down to the jacket when it was unzipped, so the flaps seemed to flop around. the s was perfect. not too tight. i'm 5'8", 140 lbs, 34c.