(with thanks to Tim Rueger and Chris Shepherd for providing needed pieces).
Kong stands 24.25" tall, is 9.25" across the shoulders, and has 15" arms. His head is 5.5" tall by 3.75" wide by 4.5" deep.
Kong is fully articulated at all joints, including wrists and ankles, and has standard primate rotational ability in his shoulders, hips, forearms, and calves. His head can nod, turn, and rock from side to side, as can his body (relative to his hips). He has four multi-joint fingers per hand, as well as an opposable, multi-joint thumb for each.
All of the pictures you are about to see are actual photographs of actual free-form poses. No prop rods, strings, or devices of any kind were used to hold Kong in the poses.