Baked goods rise and bake evenly due to aluminums superior heat conductivity and the reinforced encapsulated steel rim prevents warping Nonstick interior for easy release and clean-up, hand wash only Pan exterior dimensions 17. 9 x 12.9 x 1 inches and interior dimensions 17.1 x 12.1 x 1 inches Proudly made in the USA by Nordic Ware Actual color may vary slightly from what appears online