Is 0.000405 milimeters as long as a Brachiosaurus?
It's about 0.00000003 times as tall as a Brachiosaurus
The height of a Brachiosaurus is about 13,000 milimeters.
(based on comparable bone measurements, height to head)
Dinosaurs in the genus Brachiosaurus had an estimated height (at the head with neck fully extended) of up to 13,000 milimeters. A resin cast of the first Brachiosaurus specimen, owned by the Field Museum in Chicago, is currently on display at the O'Hare International Airport.
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