These LARGE mugs measure approx. 4" diam. by 4.5" deep. That a whole lot of tea or coffee to get you going in the morning or a "pick me up" during that after lunch slump. The STONEWARE mugs are made with food safe glaze and can be put in the microwave and dishwasher. Because it IS stoneware, it will retain the heat for a lot longer than regular ceramic mugs besides being VERY durable!