The Red Ruby is an ancient cattle breed from the English south western county of Devon. It is a rich red or tawny colour and this gives rise to the popular name of Devon Ruby or Red Ruby, also used as a marketing brand. The breed is also sometimes referred to as the North Devon to avoid confusion with the more recently developed South Devon cattle breed which is yellowish brown. Mature bulls in good working condition weigh from 1,700 lb (770 kg) to about 2,200 lb (1,000 kg). Mature cows range in weight from about 950 lb (430 kg) to about 1,300 lb (590 kg).