Bakers Ware Aluminum Commercial Baker's Half Sheet Bakers Half Sheet natural aluminum commercial bakeware is made of 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 13 x 1.06 inches and interior dimensions 16.5 x 11.25 x 1 inches Easy clean up, hand wash only