I usually wear a 6 in pants/dresses, which typically means a medium in most women's clothing. I had ordered a medium originally, and when I tried it on, I found it to be a little big in the "butt" area, and the tummy-control panel was not effective at all! Then I took a look at the size chart and realized I should have actually ordered a small. Returned my medium in exchange for a small, and it's PERFECT. Tummy-control is 100% on point. It covers my entire bottom, and the straps are wide enough to prevent any armpit "pudge" which is my biggest pet peeve. I do have to say the style of the suit combined with the bright pink color does look a little juvenile...but that's okay! It's adorable. I love the flower detailing. I'm very happy with my purchase! Size down.