Contrary to their depiction in Jurassic Park, actual Velociraptors were much smaller, roughly the size of a turkey, with skulls around six inches long. The fearsome, human-sized predators shown in the film more closely resemble another dinosaur, Deinonychus. Deinonychus was indeed a formidable creature, a fast, bipedal hunter equipped with deadly sickle-shaped claws capable of swift, fatal attacks.