Bakers Half 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 the reinforced encapsulated steel rim prevents warping Pan exterior dimensions 17.88 x 12.88 x 1.06 inches and interior dimensions 16.5 x 11.38 x 1 inches Easy clean up, hand wash only. Made in the USA. Set includes 3 Half Sheet pans Our top-rated Naturals®Bakeware collection is made of pure aluminum for superior heat conductivity and produces consistently evenly browned baked goods every time. These premium pans have lifetime durability and will never rust. Encapsulated galvanized steel rims prevent warping. Creativity meets natural aluminum sustainability. Voted "Best Baking Sheet," the Baker's Half Sheet is an essential tool in the kitchen you will use in many different ways, from sheet pan dinners to baked goods to food prep. The set includes three half sheets!