I read all your reviews, for which I thank you, before placing my order. And I am not disappointed. I needed a new pair of in-house warm-wear for my size nines and chose the chestnut ones over footwear labelled slippers. The size ten is a perfect fit with cotton socks, none too big but easy enough to pull on - so I'd say it runs at least a half-size small. No, there is no particular arch support although the heavy interior shearling will function as one as it forms to my foot pattern. I had some concern that the substantial sole might cause the boot to be hard to maneuver but that does not seem to be the case. Rather, it gives me the option of outdoor wear, or in-and-out if need be. Apparently in some regions people have adopted this Ugg-looking footwear as fashionable but I haven't seen that where I live so wouldn't be in a hurry to go around town looking quite this clunky. (As if I really care.) But I just luuuuuv the excellent quality and great warmth of this boot! And lucky me, all this for under thirty bucks.