Papo AcrocanthosaurusPapo Acrocanthosaurus Papo Model 55062 Product Dimensions: 28. 5 x 7 x 12 cm including tail Age: 3 years and up This model features an articulated jaw. Acrocanthosaurus was one of the largest meat eating dinosaurs that ever lived, measuring up to 11. 5 meters in length and weighing up to 6. 8 metric tons. Its most distinctive feature was a row of tall spines that ran down its back, which may have been used for display or regulating body temperature.