Nordic Ware 17.8" x 12.8" Premium Gold Nonstick Aluminum Commercial 3-Piece Baking Sheet Set Premium natural aluminum baking sheets with gold non-stick interior Half Sheet: 17.8 in x 12.8 in x 1 in Reinforced galvanized steel rims to prevent warping of pans High Sided Sheetcake Pan: 17.8 in x 12.8 in x 2 in Aluminum pans will never rust