DinoFact
How Big Were Dinosaurs? Biggest and Smallest Dinosaur Facts
From the tallest, longest and heaviest giants to the tiniest chicken-sized dinosaurs — facts about dinosaur sizes.
- T. rex had tiny little arms.
- Microraptor means 'tiny thief'.
- A sparrow is a tiny living dinosaur.
- Utahraptor was the largest known raptor.
- Bambiraptor was a tiny, bird-like raptor.
- The ones that did could grow into giants.
- The biggest dinosaurs had very long necks.
- An ostrich is the largest living dinosaur.
- Echinodon was a tiny plant-eating dinosaur.
- Giganotosaurus means 'giant southern lizard'.
- The asteroid left a giant crater near Mexico.
- Deinocheirus had giant arms and a humped back.
- Saurophaganax was a giant Allosaurus relative.
- T. rex had just two fingers on each tiny hand.
- T. rex was one of the biggest meat-eaters ever.
- The smallest dinosaurs could fit in your hands.
- Saltopus was a tiny early dinosaur-like reptile.
- The smallest dinosaurs were as small as a pigeon.
- Mosasaurs were giant sea reptiles, not dinosaurs.
- Supersaurus was one of the longest dinosaurs ever.
- Tyrannotitan was a giant meat-eater from Argentina.
- Wannanosaurus was a tiny flat-headed dome dinosaur.
- Gallimimus looked like a giant ostrich and ran fast.
- The longest dinosaurs stretched more than 30 metres.
- Did you know a hummingbird is a tiny living dinosaur?
- Sauroposeidon was one of the tallest dinosaurs known.
- A dinosaur's biggest enemy was often another dinosaur.
- The biggest dinosaurs weighed more than ten elephants.
- Eggshells from dinosaurs had tiny holes to let air in.
- Tiny tools and even toothbrushes help dig out fossils.
- Microceratus was one of the smallest horned dinosaurs.
- Dinosaurs were not all huge; many were small and agile.
- Giganotosaurus was one of the largest meat-eaters ever.
- Yi was a tiny dinosaur that had bat-like wings of skin.
- Argentinosaurus may be the heaviest dinosaur ever found.
- Patagotitan was one of the largest dinosaurs ever found.
- Argentinosaurus is a top pick for the heaviest dinosaur.
- Microraptor is one of the smallest dinosaurs ever found.
- The tallest dinosaurs could look over the tops of trees.
- Paralititan was a giant long-necked dinosaur from Egypt.
- Giganotosaurus was a giant meat-eater from South America.
- Gigantoraptor was a giant bird-like dinosaur with a beak.
- Nigersaurus had a wide mouth with hundreds of tiny teeth.
- Shuvuuia was a tiny feathered dinosaur with one big claw.
- Spinosaurus had a huge sail and probably swam after fish.
- The Jurassic was when giant long-necked dinosaurs roamed.
- Some dinosaur eggs were among the biggest eggs ever laid.
- Imagine the ground shaking as a giant dinosaur walked by.
- Tiny early mammals scurried around the feet of dinosaurs.
- Anchiornis was a tiny feathered dinosaur with four wings.
- The biggest dinosaurs took many years to reach full size.
- Even the largest dinosaurs hatched from fairly small eggs.
- Carcharodontosaurus had teeth like a shark's and was huge.
- Compsognathus was a tiny meat-eater the size of a chicken.
- Therizinosaurus had the longest claws of any known animal.
- Tiny fossils of skin and feathers are very precious finds.
- Mamenchisaurus had one of the longest necks of any animal.
- Supersaurus is one of the longest dinosaurs ever measured.
- A giant plant-eater's stomach was like a huge food barrel.
- Sarcosuchus was a giant crocodile relative, not a dinosaur.