Selecting an ideal enamel mug involves considering both its measurements and volume. A common enamel mug is around in the range of 3 to 4 inches in diameter, with a depth that can vary from around 4-6 inches. When it comes to capacity, most enamel mugs hold between 10 and 16 ounces of liquid. To ideally choose an enamel mug, think about how you'll