Which measurement is bigger?
The recorded length of Tyrannosaurus rex is 1.333 times the recorded length of Triceratops. The selected measurements are 12 m and 9 m, respectively.
| Object | Metric size | Imperial size | Dimension |
|---|---|---|---|
| Tyrannosaurus rex | 12 m | 39.4 ft | length |
| Triceratops | 9 m | 29.5 ft | length |
What this comparison measures
The two museum reconstructions are compared by total body length. Matching axes keeps the long tail of a T. rex from being confused with the standing height of either dinosaur.
Tyrannosaurus rex: Museum body length estimate of 12 m; larger specimens exist.
Triceratops: Museum estimate of total body length, nose to tail.
The drawings use the same physical scale, but are simplified illustrations. They show a selected linear dimension rather than mass, surface area or volume. The space between objects makes the comparison readable and does not represent a real-world separation.
Inspect the sources
Both measurement sources are linked below the interactive board. The individual Tyrannosaurus rex entry and Triceratops entry provide the selected conventions and related objects.
Change either selection to explore another pair. The full size comparison tool also lets you enter a personal height. To practise estimating rather than reading the answer first, try the daily five.