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Dinosaur Size Comparison

Argentinosaurus is the largest dinosaur here at about 115 ft (35 m) long, 2.8 times the length of a T. rex (40 ft (12.3 m)). Velociraptor was only about 6 ft 7 in (200 cm) long, roughly the size of a turkey, and far smaller than in the movies.

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How big is each dinosaur?

This dinosaur size comparison chart lists 21 entries from the largest to the smallest:

Dinosaur	Size	vs 5 ft 7 in man
Argentinosaurus	115 ft (35 m) long	20.5×
Diplodocus	85 ft (26 m) long	15.2×
Brachiosaurus	72 ft (22 m) long	12.9×
Mosasaurus	49 ft (15 m) long	8.8×
Spinosaurus	46 ft (14 m) long	8.2×
Giganotosaurus	41 ft (12.5 m) long	7.3×
Tyrannosaurus rex	40 ft (12.3 m) long	7.2×
Iguanodon	33 ft (10 m) long	5.8×
Therizinosaurus	33 ft (10 m) long	5.8×
Allosaurus	31 ft (9.5 m) long	5.6×
Parasaurolophus	31 ft (9.5 m) long	5.6×
Stegosaurus	30 ft (9 m) long	5.3×
Triceratops	28 ft (8.5 m) long	5×
Carnotaurus	26 ft (8 m) long	4.7×
Ankylosaurus	23 ft (7 m) long	4.1×
Dilophosaurus	23 ft (7 m) long	4.1×
Pteranodon	20 ft (6 m) long	3.5×
Quetzalcoatlus	16 ft (5 m)	2.9×
Pachycephalosaurus	15 ft (4.5 m) long	2.6×
Velociraptor	6 ft 7 in (200 cm) long	1.2×
Compsognathus	3 ft 3 in (100 cm) long	0.58×

What was the biggest dinosaur?

Giant sauropods such as Argentinosaurus and Patagotitan were the biggest dinosaurs, at about 115 ft (35 m) long and 60 to 80 tonnes. They are known from only partial skeletons, so their exact size is uncertain.

How big was a T. rex compared to a human?

A T. rex was about 40 ft (12.3 m) long, and its hips were about 3.7 to 4 meters off the ground, more than twice the height of a person.

Was Spinosaurus bigger than T. rex?

Spinosaurus was probably longer, at about 46 ft (14 m), but T. rex was bulkier and likely heavier.

How big was a Velociraptor really?

A Velociraptor was about 6 ft 7 in (200 cm) long including its tail and about 0.5 meters tall at the hip. It weighed about 15 kg and had feathers.

Dinosaur Size Comparison chart

Free to use with a link back to Height.compare.

Where do these numbers come from?

Sizes are typical adult or reported values, rounded for readability. Read how we measure and compare sizes.

Silhouettes from PhyloPic: Argentinosaurus by Ryan Santos Soledade; Diplodocus by Jagged Fang Designs; Brachiosaurus by Mike Taylor; Mosasaurus by T. Michael Keesey; Spinosaurus by Rhiannon Dixon; Giganotosaurus by Ivan Iofrida; Tyrannosaurus rex by JFstudios; Iguanodon by Rhiannon Dixon; Therizinosaurus by yoshi50; Allosaurus by Rhiannon Dixon; Parasaurolophus by Jack Mayer Wood; Stegosaurus by Matthew Dempsey; Triceratops by Itai Fein; Carnotaurus by JFstudios; Ankylosaurus by Itai Fein; Dilophosaurus by Rhiannon Dixon; Pteranodon by Dan Niel; Quetzalcoatlus by jack liddle; Pachycephalosaurus by Gareth Monger; Velociraptor by Rebecca Groom; Compsognathus by Jagged Fang Designs. See credits.