7 In Wonderbook: Walking with DinosaursĬreature attributes Physical appearance and biologyģ3 feet (10 meters) long with a weight of 7 tonnes, Stegosaurus was the largest dinosaur of the Stegosaurs, a race of herbivorous dinosaurs armed with plates and spikes.6 In Walking with Dinosaurs: Inside Their World.5 In Walking With Dinosaurs: The Arena Spectacular.