Boleslawiec Polish Pottery Unikat Soup Plate or Pasta Bowl Eva's Collection"Summer Day" 8.7" diameter and 1.6" deep. Oven, microwave, dishwasher and freezer safe without losing the beautiful colors and textures. Polish Pottery from Boleslawiec is scratch and chip resistant; lead and cadmium free Premium European Stoneware Certified Quality 1. Part of Eva's Collection Fired at temperatures over 2,300 degrees F for long-lasting beauty.