Details: Plush Mat Chair mat with lip is ideal for medium plush carpets and works best on carpets up to 3/4" thick, including padding. L-shape makes it perfect for L-shape desk configurations. Studded back keeps the mat in place on a variety of carpet styles. Bevel track edge is designed for easy on-off chair movement. Chair mat offers crystal-clear design and optimal protection for your carpet. Lip measures 20" x 12".