Gigantism and acromegaly are two disorders with the same disease mechanism and somewhat similar presentations. Even though they have the same disease mechanism, the two have entirely different outcome simply due to the age of onset. Gigantism is the result if the disease mechanism starts in childhood.
Adult Velociraptors grew up to 6.8 feet (2 meters) long, 1.6 feet (0.5 meter) tall at the hip and weighed up to 33 pounds (15 kilograms).
Deinonychus and Velociraptor get all the press, but for sheer killing ability no raptor was more dangerous that Utahraptor, adult specimens of which weighed almost a ton (compared to 200 pounds, top, for an exceptionally big Deinonychus).