How big is Iguanodon?
For this comparison, Iguanodon measures 10 m in length (32.8 ft). Museum estimate of total body length.
A reconstruction’s posture changes its apparent height without changing body length.
Put the measurement in perspective
The recorded length is 5.882 times the height of A 1.70 m person (1.7 m). This is a ratio of the labelled linear dimensions. It does not describe weight, area or volume.
Use the interactive comparison to see both drawings on one shared scale. You can choose another reference or enter your own height. If the sizes are very far apart, the smaller object may be almost invisible; an intermediate reference makes the progression easier to inspect.
Measurement source
Natural History Museum, London
The note above explains the specific value selected. Drawings are schematic; the stated measurement determines the scale. Report a measurement issue.
Check the convention
Fossil-based dimensions are reconstruction estimates. Another specimen or scientific interpretation may give a different value.
Read our methodology for the selection and scoring rules. Practise these dimensions in the dinosaurs size guessing game.