Non-Stick Bakeware Cookie Pans: Set of three heavy duty steel cookie pans Resists warping and heats evenly to help reduce hot spots Oven safe up to 450 degrees Fahrenheit Quality assurance guaranteed Measurements: Small measures 13" W x 9" D Medium measures 15" W x 10" D Large measures 17" W x 11" D " material="Steel" origin="Thailand"