I bought the shirt to help flatten my moobs and thought it would be a bonus to get help with the stomach too. Going by their size chart, I went with a extra large. I know the shirts are going to be snug on you; however this felt more like a medium on me. I had to have my wife help me in and out of it. The shirt did seem to flatten my chest a little bit. However as far as my stomach, it was so tight; it looked like it was making it bigger not smaller. So two stars for flattening my chest a little bit.