Chairmat with a lip is designed for medium plush pile carpets up to 1/2" thick, including padding. 25" x 12" lip design includes 3/16" thick construction and works in the following work space configurations: writing table, desk, and U-workstation. Textured top makes mat slip-resistant and scuff-resistant. Chairmat also features a studded back to hold mat in place and smooth edge for easy chair movement.