Genuine Marble - The stunning design and smooth edges make this grey marble-lined coaster a true table show stopper Smooth Underside - To hold firmly in place, the underside of the marble has been sanded down to create friction Dimensions: Outer: 10cm Inner: 8.5cm Height: 2cm Heavyweight - Ensures stability and helps to cradle the bottle so itâ€s protected from knocks and shakes With a dedicated Customer Service Team committed to providing peace of mind from our door to yours.