The Chef Clever Silicone Baking mat was designed to be used inside a 17×12 inches baking pan. To ensure long term durability and get proper baking results we do not recommend using it directly on the oven rack because it gets very hot and it is hard to remove from the oven due to its lack of rigidity. You may use it in the microwave, the freezer and it is top rack dishwasher safe. You want to avoid using any sharp object on the baking mat. This product is not intended to be used on the BBQ either. Proper maintenance, usage and storage will ensure many years of reliable usage.