Royal Worcester Classic White Porcelain Oval Serving Dish White Oval Dish 12.5" Highest quality White Porcelain Simple White Pattern. Classic and Contemporary. Dishwasher and Microwave Safe. Use unscented dishwashing soap. Never place empty dish in Microwave. Guaranteed against manufacturer defects. For additional information contact The Portmeirion Group at 1888 778-1471. M to F 8:30 to 5:00 et.