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).
Raptor isn't a name that's much favored by paleontologists, who prefer to refer to dromaeosaurs--after Dromaeosaurus, an obscure feathered dinosaur with unusually robust jaws and teeth. This running lizard isn't well known to the public, despite the fact that it was one of the first raptors ever to be discovered (in Canada's Alberta province, in 1914) and weighed a respectable 30 or so pounds.