The starburst pattern on this pan is a functional as it is beautiful The embossed designs enhance browning and crisping by allowing air and oil to flow beneath foods Made of natural aluminum that never rusts, evenly distributes the heat which makes aluminum the superior choice for professional and home bakers alike Pan exterior measures 12.9 x 17.9 x 1 inch and interior measurement 12.1 x 17.1 inches. Made in America of domestic and imported materials. Our aluminum bakeware-quality pieces are made to withstand a lifetime of use in your home kitchen.