The Calphalon Nonstick Bakeware 4-pc. Cookie Sheet Set includes two 12x17-in. cookie sheets and two cooling racks. Cookie sheets have upturned ends that make it easy to grasp and lift the cookie sheet; the open sides allow items to slide right off. Racks elevate cookies, cakes and more after they come out of the oven for best results. Calphalon Nonstick Bakeware large cookie sheets have interlocking nonstick layers to deliver high performance release.