The plastic pages will hold a full book as well. Just open it up and slide it in. Many fewer pages per 3-ring binder, but it allows you to easily access your collection and see both sides of the matchbook. If the full matchbook has printing inside that is hidden by the matches, and I also have a matchcover, I slide it in behind the full book so all the printing is visible.

Below is an example of a page with covers included to show inside printing.