Don't know much about Voltron, but he looks an awful lot like a Power Rangers Megazord, and I know all about them.
My boys grew up right in the middle of the Power Rangers craze, and they had all the Megazord toys, and they were so cool, I used to enjoy playing with them. (Alongside the boys, of course, not by myself, honest).
They are quite ingenious toys, and if Voltron is the same or similar, I understand the attraction. The Zords were about 20" tall when fully assembled, but you could break them down into 5 separate toys, and all of those could be manipulated into different forms, like weapons, vehicles, etc.