Super cute and comfortable boot. The interior is really soft and plush. I've always worn a solid 9, but my feet have gotten just a bit larger since I've had kids. I went ahead and ordered a size 9, but would have ordered a 9.5 if it came in half sizes. It fits snug with thin socks, but would probably be too tight with my thicker wool socks. I would size up if you're between sizes.