Secretariat was a very large and powerful Thoroughbred racehorse. When fully grown, he stood 16.2 hands high, which is equivalent to 66 inches or 168 cm tall
. He weighed about 1,155 pounds (524 kg) before the Gotham Stakes in April 1973, and maintained a similar weight of 1,131 pounds (513 kg) after completing the Triple Crown
. He was noted for his exceptional conformation, with a large chest requiring a custom-made girth and powerful, well-muscled hindquarters that contributed to his speed and endurance
. His stride length was measured at nearly 25 feet, which was considered very large even for a horse of his size
. In summary, Secretariat was a big, well-built horse standing 16.2 hands tall and weighing around 1,150 pounds, with a physique optimized for racing performance
