These are extremely heavy. Let me say that again: these are extremely heavy. They are made of cast brass, the side walls are 1/8 inch thick and the inside is medium luster black powder coated for beauty and durability. Whatever you use these wine coasters for they will not dent or wear out. The wine coasters measure 5 inches in diameter and are 3 inches high. Each coaster weighs 1 pound 11 ounces.