Put your company logo on display on any desk or coffee table with these custom coasters! Made of 1/4" sandstone, each coaster measures 4" x 4" and is designedto keep water rings from damaging furniture, is extremely durable and resistsmoisture. Each one can display an Ultra Vivid graphic on top. These coasters arenot dishwasher safe. Please wipe clean with a damp cloth. Great for bars,restaurants, corporate gifts and more! Complies with Prop 65. 4" D x 4" W