Keep your low pile carpet looking new with Evolve Modern Shape Chair Mats. Evolve mats are designed with a wide tapered front lip for today's 5-wheel office chair – making the most of the mat's surface area to keep your chair from rolling off. A cleated backing grips carpet up to 1/4 (0.25) of an inch thick, and a smooth top surface allows for easy chair movement. Measuring 42 inches x 56 inches, this chair mat is perfect for high-back executive chairs with a 28 inch base. Protect your floors without drawing attention. Industry leading clarity ensures your chair mat blends seamlessly with the floor underneath. Greenguard Certified and made with BPA and Phthalate free plastic, this mat is nontoxic and odor free – making it a safe addition to work environments, schools, and healthcare facilities. Tried and trusted for creating durable matting solutions, Dimex is a proud American manufacturer – providing products that will move you.