Polish Pottery 4-inch Butter Dish (Bold Blue Poppies Theme) Signature UNIKAT + Certificate of Authenticity Certificate of Authenticity and origin is included with this Butter Dish. Long lasting, colors will never fade. Hand made and hand painted in the heart of Europe in the town of Boleslawiec in Poland Lead and cadmium free. Safe to use in: microwave, dishwasher, oven up to 480 F, freezer Fired twice, extra durable, crack and chip resistant, intended for everyday use, easy to clean Dimensions: 3.94" high, 4.02" wide, 4.02" long, (max. outside edge or handle).