How big is a blue whale?
A blue whale is about 110 ft34 m1 long, maximum, Antarctic blue whales. The biggest animal that has ever lived, bigger than any dinosaur.
A blue whale next to you
Next to a child about four feet tall: the blue whale is about 28 of you long, lying head to toe.
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Where the numbers come from
- NOAA Fisheries, checked 30 October 2026.