BambooMN Brand - Heavy Duty 100% Eco-Friendly Natural Bamboo Coaster Set - 4" x 4" Square - 1 Set of 4 ALL NATURAL BAMBOO is an environmentally friendly, highly renewable resource STORNG AND DURABLE: Bamboo's density makes it naturally water-resistant, which inhibits germs and bacteria HIGH END LOOK for special occasions or everyday use GIVE ONE AND KEEP ONE: Great as a gift to any friend or to keep for yourself 1 set contains 4 bamboo coasters. Each coaster measures approximately 4" X 4" (10 cm X 10 cm)