Our mugs are a standard 15 oz coffee mug, give or take an ounce or two as each mug is individually thrown on a potters wheel and some variances are to be expected. This baby is CRISP. Any of our mugs that has gold on them, or not microwaveable as they are made with actual gold. We use a luster (gold dissolved in oil) and hand paint the design onto the mug. This takes an extra kiln firing, but it's always worth it. We just classed up this iconic Wyoming Cowboy riding Steamboat on a bright white mug. Let Er' Buck.