Oh now I see. The Harco and Dansco hold 12 per page, and I put them in flips and slide those in and out. Must be a different size book if it holds 20. I guess I'll stick with the small ones.
Wisconsin is now up to book five and Elko is on book three. I've emptied old groups and re-used the books, to save money. Maybe some day I'll get some more.
I must have read the size wrong.