ESSENTIAL SET: includes two cookie sheets; interior measures 16.75" L x 12" W x 1" H each SWEET AND SAVORY BAKING: perfect for making jelly rolls, cookies, pastries, pizza, one-pan meals, roasted vegetables, and more GREAT RESULTS: evenly distributes heat for consistent baking DURABLE: heavy-weight aluminized steel stands up to frequent use; oven safe to 450°F / 232°C SPECIALLY DESIGNED: features wire-rod reinforced rims to prevent warping