I am assuming you are talking about the skating coat (that's the only one I can think of with a hood). The hood on the coat is 5 1/2 inches wide and 6 1/2 inches high with a 1 1/2 inch cuff where the red/cream trim is. I'm not exactly sure how to post the photo I took, but the hood starts out as a perfect square (11X13) and the top edge just gets sewn down the middle and finishes with a tassel.
I hope this helps you. If I can figure out the URL photo thing, I will post that picture too.