The Thunder Group PLBM1108S Silicone Baking Sheet fits quarter size sheet pans (sold separately). Baking sheet features food grade silicone over reinforced fiberglass, withstanding temperatures up to 500°F (260°C). Since this sheet is non-stick, there is no need for grease, fats or oils. Use the smooth side for baking cookies, danishes and pastries. It is safe for use in the oven, freezer and microwave. Sheet is reusable up to 3,000 times and measures at 11-3/4 inches long by 8 inches wide.