I bought these (not a nurse, just for the record) and really wish I would have followed my gut instinct and fellow reviewers. They run big, just as everyone says. I'm 5'6" and a size 6 before pregnancy. I'm all belly and not a lot of extra weight anywhere else. i got all smalls. They sag in the crotch and butt. I could have EASILY gotten the XS without worry. They're super comfy and not bad looking if you get the right size, I'm sure. If you're second guessing yourself when it comes to these, GO SMALLER than you think. You'll thank me later.:)