.. I *would* be very surprised to see size 10's hang over the edge by
anything close to half an inch on a "normal" width board, that is between
24 and 25 cm at the waist. IMHO the ideal overhang for a reasonably
advanced rider is generally 3/8" - 3/4".

Clarification - I would be surprised to see size 10's hang over by *as
little as* half an inch on a 24-25 cm waited board. I would expect it to
be an inch or more.

Mike T