I wanted to wear this under a tight red dress I had gotten for Valentine's Day. It made my waist a little smaller, but what it REALLY flattened out, was my butt!! I'm 5'4, 130lbs, and I ordered the 3-4, I was happy with it until I turned around and saw that I no longer had any butt to speak of at all. It was very tight around my hip area in general, rather than my waist. It's like it wanted my waist and hip to be the same size. I have an almost perfect hourglass figure that I'm very proud of, and I just wanted something seamless to hold in my pouch. Then, since my dress was fitted, the seam that goes down the middle of the shaper was raised, and it completely showed through. Everyone would've known! I didn't get this thing until 30mins before I was leaving, so I tried it on, made all these terrible observations, and decided to go without it. And without underwear, I was counting on this to offer me a second shield so my pantyline wouldn't show. Oh well, it was Valentine's Day, my boyfriend thought I looked sexy, and he liked it even more when I told him I wasn't wearing anything underneath. If I can find a way to stretch out the bottom half, then I'm sure I'll use this eventually.