Drag to rotate the Stegosaurus, scroll or pinch to zoom, and click a body part - the head, a back plate, the tail, or a leg - to read what fossils tell us about it. The panel beside the model carries the real figures.
Stegosaurus stood about 2.5 m tall at the hips and stretched about 9 m from snout to tail tip - turn on the human figure to see how a person compares to this plated plant-eater.
The colors and skin here are an artistic reconstruction; fossils preserve bone, not soft tissue or color. This model is not a fossil-accurate skeleton. The measurements in the panel follow the Natural History Museum and other published figures, with ranges shown where sources disagree.
Stegosaurus 3D Viewer
This page renders a Stegosaurus as a 3D model you can spin in the browser - drag to rotate, scroll or pinch to zoom, toggle a 1.8 m person beside it for scale, and click the head, a back plate, the tail, or a leg to read a fact about that part.
Stegosaurus lived in the Late Jurassic, about 152 to 145 million years ago, in what is now western North America. The Natural History Museum cites a length of about 9 m for the genus. Adult mass estimates commonly fall between about 3.5 and 5 tonnes; a well-studied young adult specimen nicknamed Sophie is shorter and lighter (about 5.6 m and about 1.6 tonnes). A double row of kite-shaped plates rose along the back, and two pairs of long spikes tipped the tail - the arrangement often called a thagomizer.
The genus was named by Othniel Charles Marsh in 1877. The type species Stegosaurus stenops was named in 1887 from a find in Colorado. The plates and spike layout make Stegosaurus one of the most recognizable dinosaurs, even though soft tissue and color remain unknown.
| Measure | Figure |
|---|---|
| Length | about 9 m (NHM; adults of related species often cited about 6.5-9 m) |
| Hip height | about 2.5 m (plates rise taller than the hips) |
| Weight | about 3.5-5 tonnes for large adults (Sophie young adult about 1.6 tonnes) |
| When it lived | 152-145 million years ago (Late Jurassic) |
| Diet | Herbivore |
Everything runs on your device with WebGL, so the model works without an account and without sending anything to a server. The skin tone, plate color, and pattern are an artistic reconstruction, because fossils do not preserve color or soft tissue, and this model is not a fossil-accurate skeleton; the numbers above are real published values, and ranges are shown because sources vary.
Frequently Asked Questions
How big was Stegosaurus?
About 9 m long at the Natural History Museum figure, with adult mass commonly cited around 3.5-5 tonnes. A young adult specimen nicknamed Sophie is about 5.6 m and about 1.6 tonnes. Turn on the human figure in the viewer to see the scale against a 1.8 m person.
What were the plates and the tail spikes for?
The kite-shaped back plates and the paired spikes near the tip of the tail (the thagomizer) are the species' most famous bones. Exact uses are debated - display, defense, and temperature control have all been proposed. Fossils do not preserve soft tissue, so this model does not claim a single settled function.
When and where did Stegosaurus live?
In the Late Jurassic, about 152 to 145 million years ago, mainly in what is now western North America. The genus was named by Marsh in 1877; Stegosaurus stenops was named in 1887 from Colorado.
Is the model scientifically accurate?
The proportions follow published figures, but the skin color and soft-tissue outline are an artistic reconstruction - fossils preserve bone, not soft tissue or color. This model is not a fossil-accurate skeleton. The length, weight, and age figures shown are real published values, with ranges cited where sources disagree.
Do I need to install anything to view it?
No. The model renders in your browser with WebGL - no app, no account, and nothing about your visit is sent to a server. The 3D engine loads once and is then cached. When available, a free-licensed glTF model may swap in after first paint.