ES Robbins AnchorBar; Office Chair Mat with Lip, 45"W x 53"L, .130" Thick, Crystal Beveled Edge.Overall dimensions of 45" width and 53" long includes a 25" x 12" lip; standard thickness .130 of an inch; crystal (clear) edge, designed for use on carpet (including padding) up to 3/4" thick; The exclusive AnchorBar; cleat system replaces sharp pin cleats making it easier to handle the mat; Using a series of staggered, perpendicular bars, the cleat system "anchors" the mat as securely as traditional cleats yet is gentle on the carpet and fingers. Shipped rolled. All ES Robbins Office Chair Mats are proudly made in the USA.