These Cala Home hardboard decorative coasters are designed to protect tables and countertops from condensation. Made of layered construction, the surface of our hardboard coasters is coated with three layers of protective lacquer over the beautiful design, and is heat resistant to 212 degrees Fahrenheit. A soft cork backing protects your table and countertop surfaces from scratches and stains. Coasters measure 4 by 4 inches square and arrive in decorative gift box.