I'm only 6 weeks pregnant but have been so bloated that my pants barely close anymore. I was a size 6-8 before I was pregnant and a size 10 is too big for me so I purchased a size 1 and a size 2 just to be safe. I tried on the size 2 today and the fit is perfect. I'm wearing it over my jeans and under a t-shirt and you can't tell my button is undone. There are no bulges from the open jeans or button. I still need to try on the size 1 but I think I might just exchange it for a size 2 in a different color. Even after sitting down for a while the material does not rid up. I would totally recommend this to a friend. Love it!