The largest raptor claw found to date in North America belongs to a Utahraptor. This dinosaur had a length of about 20 feet (6 meters) and a height of about 7 feet (2 meters); the estimated weight of this animal fell between 1,000 to 1,700 pounds (454 to 771 kilograms). It had large, crescent-shaped claws on its forefeet and hind feet, with the two large foot claws measuring 12 inches (30.5 centimeters) in length. While the dinosaur was alive, the claws were covered with a sheath of keratin and were somewhat larger (they probably shrunk from being fossilized).