The Prisma line has a fully vitrified octagonal shape. The sides are soft, the rim is wide (1 5/8" for the charger) and the plate is thick and strong. There is an engraved fine line highlighting the angular edges. Fired twice, all pieces are guaranteed to be first quality. Plates have a glazed distinct foot. The Prisma line is broiler proof, shock resistant, microwave and dishwasher safe. It can retain a wide range of temperatures from hot to cold. With a shock resistance of up to 800 lbs. and perfect whiteness, Prisma is part of a lineage of chinaware more than 250 years old.