Papo StegosaurusPapo Stegosaurus Papo Prehistoric 55079 Product Dimensions: 22 x 4 x 12 cm Age: 3 years and up The Stegosaurus is the most famous dinosaur from a group of dinosaurs known as Stegosauria. They were all herbivores (plant eaters) and featured rows of unique bones that developed into plates and spines along their back and tail. Although the Stegosaurus body was large, the size of their brain was only around the size of a dogs. Made of durable vinyl.