enkore black iron metal coaster holder for 4 to 8 pcs of round coasters - 4.5" (11.5cm) in size fit coostors made of ceramic, marble stone, agate, steel, cork, felt, slat, silicone, leather, wood enkore matching case for any type of round coasters measured 4.3 inches (11 cm) or less in diameter. it will fit up to 4 thick stone coasters or a maximum of 8 normal coasters. cleaning in dishwasher is not recommended.