I bought this to wear under a dress to a Christmas party, very fancy formal dress. When I tried on the body shaper it was hard to hook the hooks together but I finally did it (I'm about a size 10-12, 36DD and I got a large). It was very unflattering and lumpy, I did not have a smooth silhouette. There is some sort of firm, cardboard-like piece that goes down along the tailbone and it sticks out. The underwear part of the shaper rides up the crotch. The belly part does nothing to hold you in. I had a more natural shape without the corselette! I ended up choosing a completely different outfit a half hour before the party because I was so frustrated with my appearance in the dress.