Fits a bit larger I think then most Grey's scrubs. I'm 115ish pounds and there's a lot of room in the XS top and XS bottoms that I ordered. I'm also 5' 4" and wear Dansko clogs with these and the pants still touch the ground. So they're a bit longer than normal. I ripped the tags off immediately upon arrival but if I order another set which I probably will (the cut is adorable and I love the olive) I'll order XXS in the top and in the bottom and maybe even petite.