Interesting info about Sidi half sizes. I have a 40.5, but my feet are slightly narrow and they fit wonderfully so I can't imagine they'd fit a very wide foot. My big toe was hitting the side of the shoe in a 40 so I can see there might be more room in the toe box. I wear Dominators, by the way. I have enought trouble walking gracefully in regular shoes so I didn't think road shoes would be a wise decision.

Steph