The Nordic Ware Naturals 3-Piece Cookie Sheet Set offers a lifetime of durability thanks to its durable aluminum construction. Bake the right-sized batch every time with your choice of big, half and quarter-size cookie sheets. High-Performance Baking Performance Beautifully crafted and lightweight, this set of three sheet pans is versatile for oven toasting, roasting and baking. The large edge allows for easy handling and the 20-gauge aluminum construction ensures even heating with no hot spots. The durable construction makes these pans perfect for everyday use. Every Size Cookie Sheet You Need The three sizes are perfect for everything from baking cookies to heating appetizers, and with three sizes to choose from, you can bake multiple things at once. The versatile pans offer a multitude of uses from baking (of course) and roasting to cooling treats to freezing a tray of cookies in the freezer for later-you’ll be amazed at how often you reach for this reliable set of pans. What sizes are included? The Nordic Ware Naturals Cookie Sheet Set includes one XL sheet pan (21" x 15"), one half sheet pan (18" x 13") and one quarter sheet pan (13" x 9.5"). Are these pans nonstick? These pans do not have a Teflon or nonstick coating so it’s recommended you use oil or parchment paper when baking or cooking to reduce sticking and cleanup. Are these pans dishwasher safe? To prevent warping and to preserve the quality of these sheet pans, hand washing is recommended.