The ones marked Tokens and Chips (solid brown) have 12 slot openings per page. I'm thinking they measure roughly 2 x2. There are 9 pages in the Tokens album and 8 pages in the Chips one.

The albums marked Casino chips may already be spoken for but waiting for confirmation. They each have 20 slot openings per page. They each have 10 pages. These slot openings are smaller than the albums above.