Crystal-clear mat with a lip is designed to preserve and protect your loop or berber-style carpet up to 3/8" thick (including padding). Crystal Edge creates a smooth finished edge of superb clarity while providing effortless roll on/off mat. Exclusive, AnchorBar chairmat cleat system provides easy handling, long-lasting durability and a clean, modern look. Chairmat cleats hold mat firmly in place yet are gentle on carpet and fingers. Engineered for optimum clarity, high performance and a smooth effortless roll, thick vinyl mat is designed for heavy use to protect against wear and tear from chair casters. Lip measures 20" x 10". Mat offers an intermediate thickness of 110 mil.