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 .
Sue (dinosaur)
The largest "T. rex" specimen discovered, Sue has a length of , stands tall at the hips, and has been estimated at between as of 2018. In 2011, other size estimates were between , although the authors stated that their upper and lower estimates were based on models with wide possible errors, and that they "consider them [these extremes] to be too skinny, too fat, or too disproportionate". A further estimate portrayed a leaner build, placing the specimen at , while others placed this specimen as low as in weight. Displayed separately from the whole body, the skull weighs .