About this item CHAIR MAT protects your carpet and flooring from surface friction from your desk chair wheels. The transparent chair mat allows flooring colors to show through the mat. 1/4″ THICK CARPET PILE is the ideal pile for this chair mat. The gripper-back surface of the mat works best with 1/4″ thick carpet pile. RAMPED EDGES that allow for easy off/on rolling. EXTENDED LIP allows for under desk coverage. This chair mat for carpets measures 36″ x 48″ and is 2.2 mm thick. MAT UNCURLING takes 48-72 hours. Please review the easy process in the image carousel.