This is a convenient plastic tray for holding 7cm x 11cm pieces of note paper ( which equates to 8.5x11" sheets of paper cut into 8 rectangles).
Back in the 80's, I used to cut down sheets of 8.5x11 scrap paper, that still had a good side, and used them for identifying the contents of my floppies. They were the perfect size. They extended past the front face of the disk jacket enough to put a line to identify the contents, then plenty of room for content information, or notes on the particular game or what-not.
This is a sturdy and stylish tray with convenient front access to remove pages as needed.