This deluxe, crystal color desk chair mat won't chip or curl and is non-flammable. Hundreds of molded spikes on the backside help to hold the mat on virtually any surface including cut-pile and loop carpet. *LIFETIME WARRANTY on all chair mats against cracks due to normal wear and tear. Chair mats available in 4 thicknesses - Economy, Regular, Standard, Premium. Custom chair mat shapes and sizes available. Please call for more information. NOTE: A "lip" is defined as a protrusion or extension from the edge of the mat. The lip protects the floor under the desk where the chair may roll if scooted all the way in. The picture to the left has a lip. NOTE: Chair Mats with a lip are listed using the overall size of the mat including the lip; thus, the rectangular portion of the mat is smaller than the corresponding size listed.