This is a Shelley China, England single pedestal egg cup or eggcup in the Dainty shape and Blue Rock pattern #13591 made 1945-1966 with blue trim.

The bone china eggcup measures 2.5 inches high by 2 in diameter and has a pretty floral pattern.

The egg cup is in excellent used vintage with no chips, cracks or wear and has a lovely bell like ping.

An elegant way to serve your breakfast egg. Also a great small posy vase or place setting ornament.