Some reviews scared me thinking it might not fit. I debated sizing on based on what I was reading. I'm glad I didn't though. I'm 5'3" 160lbs and I ordered a medium. It was a squeeze to get it up over the cheeks. (the satin and lace does not stretch) But once it's on; it hugs everything in the right spots. First word out of his mouth was "ddaaaammmnnnn" so I knew it was a winner. .. P.S.... With the right black high-waisted jeans and some heels it is sexy af too. Glad I decided to buy.