Muscular and powerful, this large dog is very robust. Endowed with strong, powerful limbs, his physique is nevertheless well proportioned.
His bones are compact and his head is fairly large. In spite of his sad, friendly doggy look, he has a strong character and can sometimes be fearsome.
Between 77 and 88 cm (30.31 to 34.65 inches) for the male
Between 52 and 77 cm (20.47 to 30.31 inches) for the female
Between 90 and 100 kg (198.41 to 220.46 pounds) for the male
Between 52 and 77 kg (114.64 to 169.75 pounds) for the female
All colors are possible for his coat, but the most common are the uniform ones, like white-beige, black, fawn, grey, brown and reddish shades.
Brindle and spotted white coats are also popular.
His full, smooth coat is medium length and hard.
His large head is rather square. His small eyes are brown or hazelnut and almond shaped. They look rather sad. His flat, hanging ears are triangular in shape and medium size.
His nose is black. The big tail of the Spanish Mastiff is flexible and very strong. It is carried low and descends to the hocks.
According to the FCI breeds nomenclature, this breed belongs to group 2, section 2 and is #91