If you need a chair that rolls, it's better to roll around on something like the Anji Mountain Bamboo Standard Roll-Up Chairmat (Dark Cherry). This contemporary chair mat can conveniently roll up and be stored and can be used on both carpeted and hard surface floors. The Anji Mountain Bamboo Standard Roll-Up Chairmat (Dark Cherry) is perfect for your office chair, whether you rock steady or rock 'n' roll around.Available Sizes: 36" x 48, 10lbs 42" x 48, 12lbs 44" x 52, 11lbs 52 x 48, 14lbs 55" x 57, 15lbs 60 x 48, 14lbs 72" x 48, 17lbs