Norpro 34 Professional Cutting Board, 24 in x 18 in Approved for commercial and industrial use Made of heavy, 1/2-inch thick high density polyethylene Measures: 24 x 17-inch cutting board 1/2-inch thick high density polyethylene-it won't warp Dishwasher safe Nice large working area Measures: 24" x 18" Made of Polyethylene Dishwasher safe Approved for commercial and industrial use