Dimetrodon Size Comparison
Dimetrodon 3D Viewer pairs Early Permian figures with a 1.8 m person - about 3.2 m / 250 kg for D. grandis (Size vs human uses 3.2 m) - so the sail-backed synapsid scale gap stays readable.
Dimetrodon published figures
The facts panel and this table disclose published ranges; Size vs human uses 3.2 m:
| Measure | Figure | Vs a 1.8 m person |
|---|---|---|
| Length | about 3.2 m for D. grandis; genus about 1.7-4.6 m; Size vs human uses 3.2 m | ~1.8x a person end-to-end at the 3.2 m scale figure |
| Standing height | about 1.8 m to the sail tip for a large adult (proportionate estimate) | ~1.0x adult standing height at the sail tip |
| Weight | about 250 kg for D. grandis; genus about 28-250 kg | shown as a cross-source range, not one settled midpoint for every species |
| When it lived | ~295-272 million years ago (Early Permian); carnivore; Cope 1878; tall neural-spine sail; mammal-line synapsid | not a dinosaur - predates dinosaurs by tens of millions of years |
How the Dimetrodon size-vs-human toggle stays honest
The Dimetrodon model is drawn to a fixed on-screen length so it fits the canvas; the Size vs human control then places a 1.8 m person at the true length ratio used by the viewer (3.2 m). Tap Size vs human under the canvas to show or hide the scale figure - the comparison is proportional, not a decorative sticker. Published length still spans about 1.7-4.6 m across the genus, so the toggle picks one clear scale (D. grandis about 3.2 m) inside that disclosed range.
What a person would see beside a Dimetrodon
On Dimetrodon Size Comparison, What a person would see is an Early Permian sail-backed synapsid - turn on the person in the viewer and orbit beside the sail to feel how the neural-spine crest sits relative to the scale figure. A license-clean CC-BY-SA 4.0 glTF may swap in after first paint; soft-tissue color and sail membrane remain artistic choices if the model load fails. This model is not a fossil-accurate skeleton. Dimetrodon is not a dinosaur.
What the Dimetrodon size numbers are not
What these size numbers are not is a claim of one precise length or weight for every Dimetrodon: the size comparison discloses the about 3.2 m / 250 kg D. grandis figures plus genus ranges and uses 3.2 m only for the Size vs human scale; it does not invent soft-tissue or sail-membrane color accuracy, and this is not a win/lose game. For the control walkthrough see how to view Dimetrodon in 3D. For trade-offs versus phone AR apps see Dimetrodon 3D viewer vs AR apps.
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