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How Big Is a Stegosaurus?

A stegosaurus is about 30 ft (9 m) long. That is about 5.3 times as long as the average man is tall. A plant-eater with plates on its back and spikes on its tail.

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How big is a stegosaurus compared to the average man?

A stegosaurus is about 5.3 times as long as the average man is tall. A stegosaurus is 5.3× the size of the average man: about 5.3 average men lined up would match it. By volume, about 79 average men would fit inside a stegosaurus.

Stegosaurus length in feet, inches, centimeters and meters

A stegosaurus measures:

Unit	Value
Feet and inches	29 ft 6 in
Inches	354 in
Centimeters	900 cm
Meters	9 m

Stegosaurus size facts

Stegosaurus was about 9 meters long.
Its brain was about the size of a lime.

How does a stegosaurus compare to other things?

A stegosaurus next to 24 things of similar size, plus some everyday references:

Thing	Size	Compared to Stegosaurus
Sun	865,000 miles (1,393,000 km) across	155 million× bigger
Earth	7,920 miles (12,740 km) across	1.42 million× bigger
Mount Everest	5.5 miles (8.849 km)	983× bigger
Eiffel Tower	1,083 ft (330 m)	36.7× bigger
Giganotosaurus	41 ft (12.5 m) long	11 ft (3.5 m) bigger
Tyrannosaurus rex	40 ft (12.3 m) long	11 ft (3.3 m) bigger
School bus	40 ft (12.2 m) long	10 ft (3.2 m) bigger
Whale shark	39 ft (12 m) long	9 ft 10 in (3 m) bigger
Giant squid	39 ft (12 m) long	9 ft 10 in (3 m) bigger
Fire truck	39 ft (12 m) long	9 ft 10 in (3 m) bigger
Iguanodon	33 ft (10 m) long	3 ft 3 in (100 cm) bigger
Therizinosaurus	33 ft (10 m) long	3 ft 3 in (100 cm) bigger
Allosaurus	31 ft (9.5 m) long	1 ft 7.5 in (50 cm) bigger
Parasaurolophus	31 ft (9.5 m) long	1 ft 7.5 in (50 cm) bigger
Triceratops	28 ft (8.5 m) long	1 ft 7.5 in (50 cm) smaller
Basking shark	26 ft (8 m) long	3 ft 3 in (100 cm) smaller
Carnotaurus	26 ft (8 m) long	3 ft 3 in (100 cm) smaller
Two-story house	26 ft (8 m)	3 ft 3 in (100 cm) smaller
Orca	25 ft (7.5 m) long	4 ft 11 in (150 cm) smaller
Stonehenge	24 ft (7.3 m)	5 ft 7 in (170 cm) smaller
Ankylosaurus	23 ft (7 m) long	6 ft 7 in (200 cm) smaller
Dilophosaurus	23 ft (7 m) long	6 ft 7 in (200 cm) smaller
Average man (world)	5 ft 7 in (171 cm)	5.3× smaller
Average woman (world)	5 ft 3 in (159 cm)	5.7× smaller

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: Stegosaurus by Matthew Dempsey. See credits.