Sinosauropteryx
"Sinosauropteryx" was a small bipedal theropod, noted for its short arms, large first finger (thumbs), and long tail. The taxon includes some of the smallest known adult non-avian theropod specimens, with the holotype specimen measuring only in length, including the tail. However, this individual was relatively young. The longest known specimen reaches up to in length, with an estimated weight of .
Trix (dinosaur)
The decision to use replicas from Sue for filling several missing body parts such as the feet, was made due to Sue being roughly the same length and robusticity, and the fact that they both have been estimated to be very old for a "Tyrannosaurus". Most estimates suggest sizes from 12 (39.5 ft) to 12,5 meters in length (41 ft).