English: Size diagram comparing three selected specimens of the gigantic North American dromaeosaurid Utahraptor ostrommaysi, to a 1.8 m (5.9 ft) tall human. Largest specimen is   BYU 15465 with a femoral length of 60 cm (24 in),^[1] next is   CEU 184v.260 with a 50.5 cm (19.9 in) long tibia,^[2] and finally   BYU 7510 1481 with a reported femoral length of about ~33 cm (13 in).^[3]

BYU 15465 is about 5 m (16 ft) in length, which successfully agrees with published length estimates for Utahraptor. Main reference of this size chart was the skeletal reconstruction by Dr. Scott Hartman.

References

1. ↑ (2009). "Was Dinosaurian Physiology Inherited by Birds? Reconciling Slow Growth in Archaeopteryx". PLoS ONE 4 (10): e7390. DOI:10.1371/journal.pone.0007390.
2. ↑ (1993). "A large dromaeosaurid (Theropoda) from the Lower Cretaceous of Eastern Utah". Hunteria 2 (10): 1–16.
3. ↑ (2012). "A Review of Dromaeosaurid Systematics and Paravian Phylogeny". Bulletin of the American Museum of Natural History 371 (371): 1–206. DOI:10.1206/748.1.