I buy most of the clothes in 2X on FN but when I want the clothes to fit more tight to the body or when there is a lot of stretch, I take 1X. This one I took 1X cause I wanted it to hug my curves and I did great! Right amount of stretch, high slit but sexy. One of the best purchase I've ever made on FN and I made a lot! So, do no hesitate on this one. I am 163 cm and with 5 cm heels, it's perfect.