CollectA Tyrannosaurus Rex GreenCollectA Tyrannosaurus Rex Green CollectA Model 88118 Product Dimensions: 18 x 5. 5 x 8. 5 cm Age: 3 years and up The Tyrannosaurus Rex, often shortened to T. Rex, is one of the most well known and iconic dinosaurs. Despite its fierce reputation as a top predator, it's believed that the T. Rex had tiny arms with only two fingers on each hand. But don't be fooled by its small arms the T. Rex had one of the strongest bites of any land animal ever known,