I'm 5'6" & 1 50 lbs. I got medium, white. The quality is nicer then I thought. It looks like it came from a more expensive store.. It's lined, so no cami needed. The sleeves are very flattering for those people who have less then perfect upper arms..that turned out to be a plus for me...my arms aren't fat, but the skin has gotten a little loose over the years. 