A set of four generously sized USA made coffee mugs in the festive Holly Days pattern by Corning Ware. They are Pyrex heavy white oven glass, not the thinner, more opaque Corelle type. The cups are 3-5/8 inches tall by 3-1/2 inches diameter and hold 10 ounces. Excellent condition with no damage. Corning made two similar Christmas holly themed patterns. The easiest way to distinguish between the two is that Holly Days (this pattern) has black veined holly leaves, while the Winter Holly design has white veins in the holly leaves.