How big was a Stegosaurus?
Stegosaurus was about 30 ft9 m1 long, scientists' estimate. Big plates down its back and spikes on its tail.
Stegosaurus next to you
Next to a child about four feet tall: Stegosaurus is about 8 of you long, lying head to toe.
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Where the numbers come from
- Wikidata, from the Natural History Museum's Dino Directory, checked 30 October 2026.