Nordicware American-made Professional Baking Sheet Set, 3 Pieces For bakers who prefer traditional uncoated pans, these all-purpose rectangular sheet pans are made of commercial grade aluminum with a naturally reflective surface for even heat dispersion and more controlled baking. Rounded inside corners assure easy cleaning and rolled rims provide a sure grip. American made his professional set includes one big sheet and two half sheets These will never rust. Lifetime Warranty The big sheet will bake 18 cookies and the half sheets bake 12 cookies