Langoustine 30cm Deep Rimmed PlateLarge porcelain dinner deep rimmed plate, 30cm (12 inches) in diameter, is made from hard wearing porcelain, microwave, oven and dishwasher proof. Deep rimmed plates have a depth of 4. 5cm (1 inches) and are good for pasta, soups and dishes with lots of sauce (previously called 30cm deep rimmed bowl) , as well as having a contemporary feel. Often restaurants use this style of plate for main courses as it tends to centre the food. .