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 .
Sauropodomorpha
One of the earliest known sauropodomorphs, "Saturnalia", was small and slender (1.5 metres, or 5 feet long); but, by the end of the Triassic, they were the largest dinosaurs of their time, and throughout the Jurassic and Cretaceous they kept on growing. Ultimately the largest sauropods, like "Supersaurus", "Diplodocus hallorum", "Patagotitan", and "Argentinosaurus", reached in length, and 60,000–100,000 kilograms (65–110 US short tons) or more in mass.