Custom Slate Coaster Housewarming, Wedding gift, Couples Gifts or any special ocassional gift. Each Coaster is Custom Laser Engraved with this Beautiful Swirl deisgn Monogram Design. Made of actual stone with chipped edges. Sizes may vary. Each Coaster measure 4″ x 4″ and is 1/4″ thickness. There are 4 foam dots on the bottom. All Slate items are coated with a scratch resistant, Food Safe Coating and should be Hand Washed.