Is That A Big Number?

If Height of the Great Sphinx of Giza (20.21 m) was a standard unit ...

Height of a high-diving platform (10 m)...more would be 1/2 of Height of the Great Sphinx of Giza

Women's World Pole Vault record (5.06 m)...more would be 1/4 of Height of the Great Sphinx of Giza

Women's Olympic Pole Vault record (2008) (5.05 m)...more would be 1/4 of Height of the Great Sphinx of Giza

Typical height of a giraffe (5 m)...more would be 1/4 of Height of the Great Sphinx of Giza

Women's Olympic High Jump record (2.06 m)...more would be 1/10 of Height of the Great Sphinx of Giza

Yes, there's now a book based on these numbers. Oxford University Press: July 2018.