5'6" 150s and usually wear a solid medium (36 b/c cup and bottom heavy), so I ordered a large because other reviews said it ran small. Well it's a bit snug. Not uncomfortable but definitely fitted. Flattering, but the lighter colors don't leave much to the imagination and you need a cami or seamless/smoothing bra. Looks great though. If you don't like the very fitted look, maybe order two sizes up? I did take a star away because the neckline isn't as pictured. It's literally right around my neck. Not a fan of that part, but otherwise you can't beat 3 knock around tops/work shirts for $15.