I've made these in the past... they sell pretty well and are great gifts. When I can find my measurements and plan, I'll post them for all of you. It is basically just measuring and leaving a little extra for the width of the chosen book. I do them in two sizes. One for standard paperbacks and one for the larger size. If I weren't studying for a SERIOUS test at the moment, I would find it now! Hold on - I'm coming... Do you like that song?