Ok, I ordered the sound deadener. 18 square feet of both products. I have a two door car and I am just doing the doors and with any left over... if there is any, I will put some pieces on the inside of the door panels. I went large on my measuring and got roughly 2 feet high and 3 feet long on my doors. So 6 square feet on each door and I ordered 18 square feet of both products. If I plan this smartly I can butyl the door skin and add some closed cell stuff on top of it and I should be able to cover any openings in the door as well. At least they will be deadened now.