This clear vinyl, commercial grade chair mat is designed to help your chair roll easily on carpeted floors and prevent carpet wear caused by chair casters. It features a scuff and slip resistant top surface for durability and safety. The underside has a gripper back to firmly anchor the chair mat on low pile carpet, protecting your carpet from spills and damage. The mat includes a protruding lip to protect the carpet under the desk and allow the chair to roll even when it''s all the way under the desk. [MAT-CM11233FD-GG]Overall Dimensions: 44.5"W x 40.375" - 52.25"D x 0.079"H