I am 5'9", wear a 36DD/DDD, weigh 180lbs, and am between a size 12 and 14, with an hourglass shape. I purchased an XL. The bottoms fit fine--they covered enough, but weren't full coverage which I like. The top on the other hand is awful. I normally would buy an L (I've been losing weight), but it wouldn't have mattered. I bought an XL and my breasts were literally hanging out the bottom of the top. If I wanted the top to go under my breasts, I would have showed nipple, so the only option is to pull the top up and show some serious underboob (at least 1-1.5 inches of underbook protruding on each side, and then it still barely covered my nipples). The top is maybe 3 inches wide at the widest part. Do not buy it unless you have small breasts! Not flattering at all.