In reply to The_flying_climber:
I tried on these the other day (with the Mammut rep there). I have a fairly wide foot (not hugely wide) and found they fitted my feet pretty spot on (I am about 9.5 feet and a 10 was perfect). The Mammut rep said they're designed for UK sized feet, so that may help!
Just to add I'd describe these things as boots in a shoe i.e. they are solid beasts. Would be brilliant for hiking, scrambling, via ferrata etc. Wouldn't be as good (obviously) for climbing. They are built to last!
Post edited at 14:46