• Overall mat size 15-3/16 inch x 23-1/16 inch (385 millimeters x 587 millimeters)
• Silicone-fiberglass combination
• Flexible and nonstick
• Perforated in main body of mat, but perforations glazed over with silicone on border of mat (7/16 inch / 11 millimeters wide measured from edge of mat inward and running along along entire border)
• Perforations allow heat to reach and be distributed throughout the food