Nordic Ware Natural Aluminum Commercial Large Classic Cookie Sheet Natural aluminum commercial bakeware is made of pure aluminum which will never rust for a lifetime of durability Baked goods rise and bake evenly due to aluminums superior heat conductivity and can be used with or without parchment paper Easy clean up, hand wash only Pan exterior dimensions 15.75 x 13.84 x 1 inches and interior dimensions 14.33 x 13.13 x 1 inches Proudly made in the USA by Nordic Ware