The average penguin in 3 feet 7 inches tall.
25 million year ago, however, penguins were much taller.
Paleontologists reconstructed a pre-historic penguin out of fossil bones found in New Zealand.
Dr. Ewan Fordyce had collected these bones back in 1977.
The prehistoric penguin was 4 feet 6 inches tall!
That's the same height as many middle school children.
Read more here.