Which is biggest; three Roman Pez, two Viking Ell, one Imperial Yard or half a Fathom?
A Roman Pez was twelve inches, so three make 36 inches.
A Viking Ell was 18 inches, so two make 36 inches.
An Imperial Yard is 36 inches.
And a Fathom is 72 inches, so half is 36 inches.
They are all the same!