Size comparison between ARK Giganotosaurus (45 m) and Giganotosaurus in real life (12 m). While it may appear absolutely ridiculous, this diagram should be accurate with only a minimal margin of error. :
Ark Giganotosaurus Vs Rudy by TREX096 on DeviantArt
Giganotosaurus (lvl 1) vs Rex (lvl 10.000) || Cantex - YouTube