Dinosaur Size Comparison

Patagotitan, one of the largest dinosaurs known, stretched about 37 m.

Alamosaurus, a North American titanosaur, is estimated at about 30 m long.

Sauroposeidon is estimated at 28–34 m long with a huge neck.

Dreadnoughtus is estimated at about 26 m long.

Mamenchisaurus reached about 26 m, much of it an extraordinary neck.

Brachiosaurus is estimated at about 25 m long and 12–13 m tall.

One of the longest dinosaurs — about 25 m, most of it neck and tail.

Megalodon, the extinct giant shark, is estimated at up to about 18 m.

The largest known carnivorous dinosaur, about 15 m long.

Natural History Museum lists Giganotosaurus at 13.0 m long.

A plesiosaur with an enormous neck, about 10.5 m long.

A duck-billed dinosaur with a long backward crest, about 10 m long.

One of the first dinosaurs ever described, about 10 m long.

Natural History Museum lists Deinocheirus at an estimated 10 m long.

Natural History Museum lists Corythosaurus at 10.0 m long.

The three-horned face — one of the best-known dinosaurs, about 9 m long.

The plated dinosaur with a spiked tail, about 9 m long.

Natural History Museum lists Maiasaura at 9.0 m long.

The armored tank of the Late Cretaceous, about 8 m long.

Paraceratherium, the largest land mammal ever, reached about 7.4 m long.

A flying reptile with a wingspan of about 7 m.

Natural History Museum lists Ouranosaurus at 7.0 m long.

Natural History Museum lists Plateosaurus at 7.0 m long.

A shaggy Ice Age elephant, about 6 m long.

Natural History Museum lists Styracosaurus at an estimated 5.5 m long.

Natural History Museum lists Camptosaurus at 5.0 m long.

The dome-headed dinosaur, about 4.5 m long.

About the size of a turkey in real life — 2 m long including the tail.