Therizinosaurus Size Comparison
Therizinosaurus 3D Viewer pairs published Late Cretaceous figures with a 1.8 m person on screen - length about 9-10 m (Size vs human uses about 9.5 m), height about 4-5 m, and weight about 5-10 tonnes - so the scale gap stays readable at a glance.
Therizinosaurus published figures
The Therizinosaurus facts panel and this table disclose published ranges rather than one invented single number; the Size vs human control uses about 9.5 m as the length scale ratio:
| Measure | Figure | Vs a 1.8 m person |
|---|---|---|
| Length | about 9-10 m; Size vs human uses about 9.5 m | ~5.3x a person end-to-end at the 9.5 m scale figure |
| Height | about 4-5 m | roughly 2-3x a standing person |
| Weight | about 5-10 tonnes depending on method; NHM (London) does not commit to a single mass | shown as a wide range, not one point figure |
| Hand claws | bone core just above 50 cm - longest claws of any known land animal | giantClaw click-fact in the viewer; keratin sheath length estimated |
| When it lived | ~72-66 million years ago (Late Cretaceous, Maastrichtian, possibly late Campanian), Nemegt Formation, Gobi Desert, Mongolia | named 1954 by Evgeny Maleev; holotype PIN 551-483 found 1948 |
How the Therizinosaurus size-vs-human toggle stays honest
The Therizinosaurus 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 (about 9.5 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 9-10 m, so the toggle picks one clear scale inside that disclosed range.
What a person would see beside a Therizinosaurus
What a person would see is a bipedal, long-necked herbivorous theropod with dramatically enlarged forelimbs and giant hand claws - turn on the person in the viewer and orbit beside a hind leg or a giant claw to feel how the body sits relative to the scale figure. Skin color is an artistic reconstruction; overall body shape is inferred from more complete relatives (Beipiaosaurus, Nothronychus), and feathering is inferred from Beipiaosaurus, not directly observed on Therizinosaurus.
What the Therizinosaurus size numbers are not
What these size numbers are not is a claim of one precise weight: the Therizinosaurus size comparison discloses the about 9-10 m, 4-5 m, and 5-10 t ranges and uses about 9.5 m only for the Size vs human scale; it does not invent a settled body shape or direct feather fossils for this genus alone, does not claim it was a predator despite the claws, no free-licensed Therizinosaurus glTF is re-hosted yet so the viewer stays procedural with longArms, longNeck and beak, and this is not a win/lose game. For the control walkthrough see how to view Therizinosaurus in 3D. For trade-offs versus phone AR apps see Therizinosaurus 3D viewer vs AR apps.
Other dinosaurs to compare
Other dinosaurs in the collection make useful size comparisons too: Therizinosaurus is a Late Cretaceous Gobi herbivorous theropod, so for a larger contemporary apex predator see the Tyrannosaurus rex 3D Viewer, or for another Nemegt biped already shipped see the Gallimimus 3D Viewer.
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