I'm usually a 8.5, but the 9's were too large. I would have possibly tried an 8, but the other factors ruled that out. There is no real arch support, so if you have high arches , you'll have to take that into account. There were also very stiff, but well made.
I have to say comfort is a biggest factor for me, these just did not have that. I would've expected better from UGGS.