The Pyrenean Mastiff is a very large dog. The minimum acceptable height at the withers for males is 77 centimetres (30 in), and for females 72 centimetres (28 in); there is no upper limit, and larger dogs are preferred. They have a heavy white coat with a mask of a darker colour, and often with patches of the same colour on the body; the ears always have darker spots. The weight varies between about 60 kilograms (130 lb) and 90 kilograms (200 lb). :553