Tylosaurus Size Comparison
Tylosaurus 3D Viewer pairs published Late Cretaceous Western Interior Seaway figures with a 1.8 m person on screen - length about 8-14 m (Size vs human uses 13 m), mass about 1.1 tonnes to several tonnes - so the mosasaur scale gap stays readable at a glance.
Tylosaurus published figures
The Tylosaurus facts panel and this table disclose published ranges rather than one invented single number; the Size vs human control uses 13 m as the length scale ratio:
| Measure | Figure | Vs a 1.8 m person |
|---|---|---|
| Length | about 8-14 m for large adults; some specimens near 12-13.2 m; Size vs human uses 13 m; recent revisions also reconstruct some T. proriger smaller (about 3.9-9.5 m) | ~7.2x a person end-to-end at the 13 m scale figure |
| Body depth | about 2 m for a large adult (proportionate estimate) | ~1.1x adult standing height |
| Weight | about 1.1 tonnes for mid-size Santonian adults to several tonnes for the largest forms | shown as a cross-source range, not one settled midpoint |
| When it lived | ~90-66 million years ago (Late Cretaceous), Western Interior Seaway; carnivore; Marsh 1872; elongated toothless snout tip; distinct from Mosasaurus (~11-17 m) | marine reptile (mosasaur) - not a dinosaur |
How the Tylosaurus size-vs-human toggle stays honest
The Tylosaurus 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 (13 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 8-14 m (with some specimens near 12-13.2 m), so the toggle picks one clear scale inside that disclosed range.
What a person would see beside a Tylosaurus
On Tylosaurus Size Comparison, What a person would see is a Late Cretaceous Western Interior Seaway mosasaur - turn on the person in the viewer and orbit beside a flipper to feel how the marine body sits relative to the scale figure. A license-clean CC-BY-SA 4.0 glTF may swap in after first paint; soft-tissue color remains an artistic choice if the model load fails. This model is not a fossil-accurate skeleton. Tylosaurus is not a dinosaur.
What the Tylosaurus size numbers are not
What these size numbers are not is a claim of one precise length or weight: the Tylosaurus size comparison discloses the about 8-14 m / 1.1 tonnes-to-several-tonnes ranges and uses 13 m only for the Size vs human scale; it does not invent soft-tissue color accuracy, and this is not a win/lose game. For the control walkthrough see how to view Tylosaurus in 3D. For trade-offs versus phone AR apps see Tylosaurus 3D viewer vs AR apps.
Other animals to compare
Other animals in the collection make useful size comparisons too: for the often-longer European mosasaur form see the Mosasaurus 3D Viewer.
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