Your porcelain can, with some care, be safely used in oven, microwave and dishwashers. Sudden changes in temperature (eg. from freezer to oven) is likely to cause thermal shock, which will damage your porcelain. Always place very hot items onto either wood or cloth. To avoid glaze scratches ideally your mud porcelain will be stored in plate racks or with linen/felt between each item. Nb. Orange, plum, red and slate porcelain are expensive colours and trickier to produce, hence the higher item price.
DIMENSION APPROX: Imperial 3 x 5.9″ Metric 7.5 x 15cm