THE ONLY BEVELED EDGE MAT IN THE MARKET! - Many mats are straight edges, and you might trip on them or cut your self, our mat is beveled edge to easily roll your chair up and down. SHIPPED FLAT - Our mats are shipped flat, To ensure that it stays flat when arriving without having it curling up all the time. IDEAL SIZE - 36" X 48" Is the ideal size you need to work comfortable - Mastermat offers The THICKEST mat in the market.