Sizing: I'm 5'7", about 175 lbs, 34B chest, 33" waist 44" hips at widest point (size 14 pants). I got the L and can zip it up with help :) This dress flattens out my small chest, even with a padded strapless underneath (it honestly makes no difference if the bra is there or not; the dress itself is so tight and structured). And as others have mentioned, it is TIGHT. I would only wear it when I want to look very obviously sexy (or maybe try a larger size). But my butt looks fantastic!See full review