Lorell 25754 Rectangular Chairmat, Studded, Medium Pile, 46"x60", Clear Sold as 1 EA. Chairmat with no lip is ideal for medium-pile carpets and works best on carpets up to 3/4" thick, including padding. Studded back keeps the mat in place on a variety of carpet styles. Smooth edge is designed for easy on/off chair movement. Chairmat offers crystal-clear design and optimal protection for your carpet.