These Ceramic escutcheons were quite common back in the day, but have gotten hard to find as of late. They would have been installed in Standard brand tub/shower applications where the handles were ceramic. These measure 3 1/4″ OD, 7/8″ ID, and stand 1 1/2″ tall. Sold by the each, best goes first, VERY limited supply. Sorry, we do not have any of the escutcheon nuts that would have accompanied these.