Rubber bottom provides a non-slip grip on their desktops for smooth clicking. This non-slip grip is made from a combination of 50% post-consumer and post-industrial rubber. Antimicrobial surface helps extend the life of the mouse pad by keeping it clean and odor-free! Especially helpful at community consoles such as college computer labs, library computers, web-based punch clocks and more. For the circular mouse pad, see item #107760-CR Antimicrobial Recycled Mouse Pad - Circle. Size: 7-7/8" x 8-3/4" x 1/8".