How big is a Tyrannosaurus rex?

The specimen known as Sue measures about 12.3 meters. That is 12.3 m (40.4 ft) long.

12.3 m long · 40.4 ft

The specimen known as Sue measures about 12.3 meters.

Family car 4.5 m

Tyrannosaurus rex 12.3 m

Tyrannosaurus rex next to family car, drawn to scale.

Compared with things you know

A Tyrannosaurus rex is about 6.2× the height of a basketball player Basketball player: 2 m
A Tyrannosaurus rex is about 6.1× the height of a door Door: 2.03 m
A Tyrannosaurus rex is about 2.7× the length of a family car Family car: 4.5 m
A Tyrannosaurus rex is about 2.2× the height of a giraffe Giraffe: 5.5 m

Think you could size it by eye? A Tyrannosaurus rex is one of the objects in Sizedle.