Selecting an ideal enamel mug involves considering both its size and how much it holds. A common enamel mug is roughly 3 to 4 inches in diameter, with a height that can vary from ranging between 4 and 6 inches. When it comes to capacity, most enamel mugs hold between 10 and 16 ounces of liquid. To perfectly choose an enamel mug, think about how yo