4-Pack Absorbent Stone Coasters with Protective Cork Backing 4” Square. Manufactured in the USA of absorbent stone to absorb excess condensation from beverages. Cork backing protects your surfaces from scratches and stains. Each Coaster measures 4” square. Funny quote allows the Coaster to remain displayed even when not in use. This 4 pack Coaster Set makes a wonderful gift for family and friends at any time of the year.