O if this aint the truth! I went from looking like I just had a baby or 3-4 months preggers, to old school coke bottle shape! I got a small (5'4, 156lbs) 36inch, measured around my belly button. Because I figured with the extension I would fit it and wouldn't have to buy a smaller one when I lost weight. I can fit it and still breath, but it required 2 ppl to put on lol!Update(12/19/22), I am now able to hook it up on the second row or the extension, no change in diet or working out... maybe its stress....! I love this thing, wish the snaps didn't show under my shirts.