Day-Timer Desk Calendar Black Plastic Base, 2-Hole, 3 1/2 x 6 Inches (D20295) Black plastic base has 2 metal rings to hold 3 1/2" x 6" calendar. Angled display for easy viewing. Convenient pen/pencil holder. Non-skid rubber feet Holds standard 3 1/2" x 6" 2-hole desk calendar refills.