How big was a Brachiosaurus?
Brachiosaurus was about 75 ft23 m1 long, estimate. A tall giant plant-eater with front legs longer than back legs.
Brachiosaurus next to you
Next to a child about four feet tall: Brachiosaurus is about 19 of you long, lying head to toe.
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Where the numbers come from
- US Geological Survey, Dinosaurs: Facts and Fiction, checked 30 October 2026.