Each set of four 16 oz.; Mugs is pre-engraved with your choice of single-letter monogram The 'Original Moscow Mule Mug', Solid Copper Construction with a Smooth Finish, Nickel-Lined with a Cast Brass Handle, 16 oz. Capacity, Set of 4 A coating of resilient lacquer resists tarnishing, keeping these mugs looking good for years with minimal upkeep