Zigabob's silicone-coated non-stick baking mats come in a SET OF 3 Two of the mats are 15.75 x 11.8 inches (ideal for 18 x 13 inch trays/pans), and the third mat is 11.8 x 7.9 inches. Produced using FDA (USA) and LFGB (Europe) approved materials, these silicone mats are oven, microwave, and freezer safe and can also be used on the countertop when working with all types of dough. They make any baking sheet nonstick--no greasing necessary.There is no need to use cooking sprays, oils or parchment paper - you save both calories and money. The silicone surface creates an even heat distribution, so all of your favorite recipes come out perfect every time. The mats can be used at temperatures varying from -76°F to +446°F. Flavors or odors will not penetrate the baking mats. Zigabob silicone baking mats are unbreakable, flexible, and strong.The flexible structure allows you to store the mats rolled up or flat.