only started using this in my 8th month at 32 weeks. Could have used it sooner but didn't need it. Comfortable on my thighs (where most of my weight gain was), the waist band which is obviously well above the natural waist didn't pinch at all. It smoothed everything out very well, didn't give me back fat rolls or anything (luckily don't have back fat or a muffin top to begin with). I started at 120 lbs and am 145/150 almost at the end. Got size B, usually a size A.