UGG boot sizes,,are the bigger/smaller?

I think they run big. I normally wear around 8 1/2-9 in shoes but my UGGs in 7 fit comfortably. It depends if you want to wear socks, too, because I have some 8's that fit better if I'm wearing thick socks. Plus, mine stretched out a little after use. So I would recommend a 9 for you.