Genuine Slate stone hexagon coaster set of 4. Engraved and designed in store for a unique statement with family name and initial. Great addition to any home bar or coffee table to spark a conversation. Measure approximately 4 inches in diameter with 4 foam feet on each coaster bottom to make them non-slip. Slate is naturally different shades of black and gray so each coaster is one of a kind. (Add last name to "SPECIAL INSTRUCTIONS" box at checkout to get your proof before we make your coasters)