The idea of the costume is that is a construct generated by the ring. As it is form-fitting in other place, it sort of makes sense than it would contour to the foot like that. It's weird in a still shot, but I'm guessing that in action it will be barely noticeable.
(edited by samoflange on 12.4.11 2308) Lloyd: When I met Mary, I got that old fashioned romantic feeling, where I'd do anything to bone her. Harry: That's a special feeling.