This personalized round slate coaster set includes six genuine slate coasters, a polished gift for clients, weddings and housewarmings. Real slate takes laser engraving and sand carving, and laser engraving turns the surface light gray. Size: 4" diameter x 1/4" per coaster. Maximum imprint area: 3 1/2" diameter. Six genuine slate coasters boxed in protective EVA foam and shrink wrapped. Shape and color vary slightly from piece to piece. Four foam dots on the bottom of each coaster. Scratch-resistant, food-safe coating. Sold in case quantities of 8.