Libbey Classic Coffee Mug (Box of 12), 13 oz, Cobalt Twelve 13 ounce capacity glass coffee mug in cobalt blue; Height: 3 3/4 in. diameter - 4 3/4 in Great for hot drinks or soups Excellent wedding, housewarming or host gift The item is microwave safe, adding boiling water to the glass is not recommended Dishwasher safe