To add to all the confusion, just PM'd the guy and the outsole measures to 12.4", and he normally wears 11 in Nikes and 43 in CP, so definitely a size up from myself.
I wear 43 in GATs, pretty much all my shoes measure to 12", PM'd the guy at Aloha for the outsoles on their black side zips (with the heftier sole which I like better) and the 42 has a 12" outsole. I'm guessing I'm a 42 or 42.5 with thick socks...
This is the pair I think is most attractive:
