The Mainstays Reusable Silicone Baking Mat is a great product for you to make perfectly sized cookies. All you have to do is line a cookie sheet or pan with the mat and place dough into the 15 equidistant sized rings to make consistent, delicious treats. The Baking Mat also has central rings that provide you the measurements for bigger sizes from 3 inch to 9 inch. The Mainstays Baking Mat is made from premium food grade silicone that provides a non-stick surface for easy food removal. This reusable mat is a great earth-friendly baking tool as it allows you to stop using disposable parchment, wax paper and tin foil for years to come. They are also ideal for healthy cooking: use a mat without added cooking oils, butter or sprays to save on calories and fat. Each mat is oven safe for up to 400°. The Mainstays Mat fits a half-sheet size pan. Wash mats before use. Wipe clean with a soft, damp cloth after each use. Store flat or rolled. Measurement: 16.5 inch x 11.6 inch (42 cm x 29.5 cm). Weight: 4.3 oz