Turquoise Wood - Teal Wood Design Vintage - Set of 4 Coasters 1/4 inch thick Very High Quality Turquoise Wood - Teal Wood Design - Set of 4 Coasters 1/4 inch thick Very High Quality Set of 4 Coasters Each Coaster is 4 x 4 in diameter and 1/4 inch thick They also have a genuine black rubber (not foam or cork) base for a non-slip finish.