This is a great folder and I intend to get several more. They hold 5 pages ( additional purchase) that fill up fast if you have larger stamps. I want to get one for my Christmas unmounted stamps, one for the Halloween ones, etc.... I also was able to fit in one of the Dylusions sets that comes on it's own 3/4 page size. It fits on two of the plastic binder ring things. I don't think you'd get more than 1 extra sheet in the binder.
This notebook is part of a great system for removing stamps from their wooden backing and transforming them into acrylic stamps. I went from five shoebox-sized boxes to three notebooks, significantly streamlining my storage.