Inspired by her loving family to create her cheery household designs, Meghan of Virginia hand-paints each slate coaster with a colorful butterfly. She then coats each piece with sealant three times for added durability. These coasters are UV resistant, and can be used indoors or out. No two pieces will be exactly alike. Handcrafted exclusively for Uno Alla Volta, from the heart and hands of the artisan. Dimensions- set of four, each 4 inches square.