Artchros 11.6x16.5 inches Half Sheet Nonstick Silicone Baking Mat - Red Food simply does not stick to the surface of these baking mats. Thick &Large size 16.5" x 11 5/8". Unlike bleached parchment papers, these mats contain no harmful chemicals. Use in the oven, toaster over, microwave, or freezer: Oven-safe up to 475 degrees F All materials are FDA and LFGB-app100% food-safe silicone that is nonstick and simple to clean with soap and water.roved All materials are FDA and LFGB-approved