Iguanodon Size Comparison
Iguanodon 3D Viewer pairs published Early Cretaceous ornithopod figures with a 1.8 m person on screen - length about 9-13 m for Iguanodon bernissartensis (typically cited around 10 m; Size vs human uses 10 m), hip height about 2-3 m when quadrupedal, and weight about 3-5 tonnes - so the scale gap stays readable at a glance.
Iguanodon published figures
The Iguanodon facts panel and this table disclose published ranges rather than one invented single number; the Size vs human control uses 10 m as the length scale ratio:
| Measure | Figure | Vs a 1.8 m person |
|---|---|---|
| Length | about 9-13 m for I. bernissartensis; typically cited around 10 m; Size vs human uses 10 m | ~5.6x a person end-to-end at the 10 m scale figure |
| Hip height | about 2-3 m when quadrupedal; higher when bipedal | about 1.1-1.7x a standing person at the low end of the hip range |
| Weight | about 3-5 tonnes | sources disagree by individual - shown as a range |
| Signature anatomy | beaked snout; conical thumb spike on each hand (function debated: defense, foraging, or rival fighting); bipedal or quadrupedal locomotion | thumb spike is clickable on the arm mesh; no nose horn (Mantell 1825 error, corrected after Bernissart 1878) |
| When it lived | 126-113 million years ago (Early Cretaceous, Barremian-Aptian), Europe | named 1825 by Gideon Mantell; Bernissart find of about 38 near-complete skeletons in 1878 |
How the Iguanodon size-vs-human toggle stays honest
The Iguanodon 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 (10 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 9-13 m, so the toggle picks one clear typical scale inside that disclosed range.
What a person would see beside an Iguanodon
What a person would see is a large beaked herbivore that could stand on two legs or drop to all fours, with a conical thumb spike on each hand - turn on the person in the viewer and orbit beside a hind leg to feel how the body sits relative to the scale figure. Skin color is an artistic reconstruction; the viewer does not invent a settled thumb-spike function or a nose horn.
What the Iguanodon size numbers are not
What these size numbers are not is a claim of one precise length or weight: the Iguanodon size comparison discloses the 9-13 m and 3-5 tonne ranges and uses 10 m only for the Size vs human scale; it does not invent a settled thumb-spike function, does not claim Iguanodon had a nose horn, no free-licensed Iguanodon glTF is re-hosted yet so the viewer stays procedural with a beaked snout and thumbSpike arms, and this is not a win/lose game. For the control walkthrough see how to view Iguanodon in 3D. For trade-offs versus phone AR apps see Iguanodon 3D viewer vs AR apps.
Other dinosaurs to compare
Other dinosaurs in the collection make useful size comparisons too: Iguanodon is an Early Cretaceous beaked ornithopod, so for a crested Late Cretaceous duck-bill see the Parasaurolophus 3D Viewer, or for a much larger Late Jurassic sauropod see the Apatosaurus 3D Viewer.
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