I've been indexing my sets off and on for the past two weeks. I found index cards bound in one corner with a hard cover at Target months ago. It is from the Real Simple line of products. This way I can remove the card to decide if I want to use one set with the other. I can even compare without undoing the screw because the pages swing around the bolt in the corner. There are to sizes of books. They have 75 pages. The larger one measures 4 x 6.5. The smaller one is 3 x 5.5. I will use two pages if the set is too big to fit on one. I will try to upload a photo soon.