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).
1 Argyrosaurus superbus 65-130? feet (20-40 m). 2  Giraffatitan brancai 75-100? feet (23-30 m). 3  Diplodocus-grew up to 90 feet long (28 m). 4  Brachiosaurus-about 85 feet long (26 m), 40 feet tall, and weighed 70-80 tons.