I've had these for two seasons and ditto the comments above - fit like slippers (size 41 ~= 8-1/2 US). I put some better liners in for more arch support and can't say enough about them.
I've worn them from low 20s to over 100 and they really perform. Waterproof, easy to walk in and very rugged. I've started to notice some wear on the left heel because that's the foot I rotate to get on the bike, but it's normal
I also bought the Oxtar Infinity boots from newenough.com figuring that boots from the same manufacturer would use the same sizing and it's true - boots fit like they were custom made for me - although the Infinitys are much more the combat touring style boot, I still love them. Think they will be much warmer in hot weather riding. I'll carry both on a loong ride.
Clean'em with a boot scraper from REI, use the suede brush on the Gore-Tex and they're as good as new again.
In colder weather I use a wool sock and a poly liner - good to low 20s.
YMMV.
LDMike
Milwaukee