Excellant&eacute; Royal White Collection 4-Inch Square Plate, Royal White 4-Inch square plate - Royal White Made out of 100-Percent non-toxic melamine material Bold, sharp design of royal collection provides versatility in any occasion It is dishwasher safe and National Sanitation Foundation (NSF) approved Not recommend for microwave or oven use, but able to withstand up to 212 degrees fahrenheit