It’s been more than 20 years (we think) since mugs have been made this small. After many requests for espresso specific cups, we made a round. These all hold at least 1/3 cup, 2.67oz. Some hold a little more. They measure approx. 2 1/4″ tall with a 2″ opening. All of our pottery is lead free. Dishwasher and microwave safe. This is glazed in light blue on a deep, rich, dark green underglaze. Each one is hand glazed, therefore, glaze design may vary slightly from the one pictured.