I'm 5'4", 160lbs, and usually wear a size medium. I really love this jumpsuit! It fits very well, good material and shapes my body well. It was a hit and I got compliments all night. My only disappointment was the zipper. Why would they put this cheap zipper on this nice form fitting jumpsuit!! Before my night ended, it broke on me!! But I adore this jumpsuit so much I'm going to take it to get a better more sturdy zipper put on it. IT'S WORTH IT!