Chef's Counter Red Stoneware Cookie Sheet 10.5"x17.9" Baking Tray NIB Chef's Counter red stoneware cookie sheet, sized 10.5" x 17.9", designed for baking. Key features include: Made of fine-quality stoneware for durability and even heat distribution. Safe for use in the microwave, oven, and broiler (up to 450°F) and freezer. The interior is nearly non-stick for easy cleanup. It is dishwasher safe. Stoneware retains heat well, keeping food warm.