Wilson Jones Favorite Desk File Sorter, 10 x 12 Inches, Expands 1.5 Inches, A to Z Index, Midnight Blue (WCC3BL) Book-style sorter easily organizes materials on desk Each bellow-style compartment expands up to 1.5 inches Durable and moisture-resistant acrylic-coated cover promises heavy, long-term use Alphabetical A to Z index Measures 10 x 12 inches for holding letter size sheets