This is a vintage coffee mug/cup made by Hartstone Pottery in the 1970s. The mug has a blue windowpane pattern and a red heart-shaped flower design. It is made of stoneware and has a capacity of 12 oz. The set includes a coffee cup and a coffee mug. The item is 3.75 inches in diameter and 3 inches in height. It is machine washable and was made in the United States.