I’m 138 lbs and got an XS to S and like the tighter fit. It does slip down some and I wish it was **** so it’d be hide able under a lot more than dark colors. And it’s pricey compared to what it dose compared to other stuff that dose the same thing. I think I paid $50 to $60 plus and can’t wear it unless it’s like a tee shirt and jeans and the jeans slide around a lot. I miscarried at 17 weeks so I was hoping for more out of this and the sweat band would of worked better but I can only afford thing at a time so hopefully those sweat bands and other compression tummy wise things go on sale soon. My body’s a sad reminder of what happened and I used this brand with my now 1 year old and other sweat bands/ waist trainers they all work some just are better made. It’s not a diss it’s just probably better for someone else. I’ll keep trying to use it when I can but I do wish there was more for the money, little straps to help from rolling and being **** would have helped a lot. It stays decent but I do have to re adjust whenever I sit down.