Sell sheets are basically your calling card to the company. It describes your idea in a short and concise manner. You are using this to get the company interested. The best way to describe it is think about the blurb you see on the back of a novel. It gives you an overview of the 300 pages in the book. Based on this blurb the Writer is hoping you will be interested enough to purchase the book. Go to a book store and look at the back of a number of books to get an idea of what you need to do. You need to keep your sell sheet to 2 pages or less any more than that and you are wasting the reviewer’s time.  If I told you that you can read a pamphlet or a 300 page novel to understand my products benefits which would you choose? I see Inventors have a small phone book and they can’t understand why they get their presentation back unopened or can’t understand why they got a No. When it comes to sell sheets less is more.