These are 4" round coasters made from cherry wood with a HP theme. They are triple coated in a marine grade coating to protect the wood against moisture damage. They have cork on the bottom to prevent them from sliding. There are two styles currently available. The first style features crests from Ravenclaw, Hufflepuff, Gryffindor, Slytherin, and Hogwarts. The second style features photo-real characters from the Harry Potter series. Our coasters are $8 or four for $24. Due to the unpredictable nature of wood, products may be slightly different in coloration.