CollectA Pachycephalosaurus CollectA model 88629 Product Dimensions: 10 x 4 x 5.7 cm Age: 3 years and up The Pachycephalosaurus was a unique dinosaur that lived around 70 million years ago in what is now North America. Its name means "thick-headed lizard," and for good reason - it had an incredibly thick, dome-shaped skull. This special skull could have been up to 10 inches thick! Scientists believe this dinosaur might have used its hard head in head-butting contests with other Pachycephalosaurs, much like some modern-day animals use their horns or antlers. Hand painted and highly detailed. Made of durable vinyl. Manufactured from a high quality, non-toxic PVC that passes the quality standards for the Australian/NZ toy industry as well as that of USA and Europe.