Polish Pottery Mug 12 Oz. From Zaklady Ceramiczne Boleslawiec #1473-149 Art Signature Pattern, Capacity: 12 Oz. Dimensions: Height: 3.5" Diameter: 4" Capacity: 12 Oz. Boleslawiec white clay molded and painted by hand Polish Pottery is oven- dishwasher- stove- and microwave oven safe, lead and cadmium free, resistant to chip Manufacturer: Zaklady Ceramiczne "Boleslawiec" Pre-baking at 1562 degrees Fahrenheit, Glazed and fired at 2280 degrees Fahrenheit