Shoe design

hi, ive recently been given a project of designing a sporting shoe(still in highschool) in Graphics class and i chose to do a basketball shoe now ive done some rough sketches but i cant seem to my proportions right(ie heel is too low, or the whole shoe looks cramped) i was wondering if anyone has some tips on how to draw shoes of any kind. the final has to be in third angle projection.

Scroll down to the footwear section on the main page and the answers are there for you.