HomeStart Non-Stick Silicone Baking Mat (Half Sheet Size) 11-5/8-Inch x 16-1/2-Inch Fits half size baking sheets 18" x 13". Durable and long lasting. Easy to clean with warm water and mild dish soap and air dry or dishwasher approved for top rack only. HomeStart Silicone mats are perfect to use for in the oven, microwave or freezer. Set provides outstanding heat conductivity; FDA and LFGB approved silicone. HomeStart Silicone baking mats can withstand temperatures from -40 degrees Fahrenheit to 480 degrees Fahrenheit. Non-Stick Surface Blocks Odors and Flavors from Penetrating Multiple purposes and can be used for making bread, cookies, buns, candy or anything you can think of.