The Arabian breed is a compact, relatively small horse with a small head, protruding eyes, wide nostrils, marked withers, and a short back. It usually has only 23 vertebrae, while 24 is the usual number for other breeds. The horse's average height is about 15 hands (60 inches, or 152 cm), and its average weight ranges from 800 to 1,000 pounds (360 to 450 kg). It has strong legs and fine hooves. The coat, tail, and mane are of fine, silky hair. Although many colours are possible in the breed, gray prevails. The most famous stud farm is in the region of Najd, Saudi Arabia, but many fine Arabian horses are now bred elsewhere.