This pretty, extra large "Breakfast Cup" was made by New Hall of Shelton, Staffordshire around 1825-30. The breakfast cups were not ordered with every tea set, and are much less commonly found than tea and coffee cups. The diameter of the cup is 4-5/16". The height to the top of the London-shape handle is 2-3/4".
Although this cup is not marked, it matches the New Hall teapot I currently have for sale here in my Ruby Lane Shop. Its New Hall pattern number is 1822. That pattern, 1822, is illustrated on page 180, plate 183 of "A Guide to New Hall Porcelain Patterns" by A. de Saye Hutton.
A description of the pattern is given on page 51 of the book: "Gold edge and border lines. Broad band comprising large single pink roses, brown twigs with small yellow flowers, green leaves, and blue/green catkins."
This rare cup is not perfect. It has a tight hairline crack which can be seen both outside and inside the cup. There are no other cracks, no chips, and no wear to the decoration or gilding. It still rings when tapped. It will make a great study piece for the advanced collector!