Custom Black Sabbath v3 Mouse Pad g4215 This 7.75" x 9.25" x .25" diameter round corner mousepad is made of a durable heat-resistant polyester fabric top, will keep your mouse rolling in style. Backed with a neoprene rubber non-slip backing, keeps the mousepad from sliding. The mousepad is 1/4" thick. This mouse pad will last a long time. The mousepad can also be used as a placemat.