07 or 08?
i have a similar size foot, and i bought the 07 7-9s, but i got heaps of heel movement, so i was pretty unhappy with them. tried on a friend's pair of 5-7s and they're awesome! if you can try them on, then do so to double check, but if you can't i'd say go for the 5-7s. they're heat moldable as well anyway, so if they're a bit tight you should be able to mould them to fit better.