It's about as tall as The Statue of Liberty.
In other words, the height of The Statue of Liberty is 1.007 times 404 spans.(a.k.a. "Liberty Enlightening the World," a.k.a. La Liberté Éclairant le Monde) (Liberty Island, New York City, New York) (pedestal base to torch peak)
It's about as tall as Big Ben.
In other words, the height of Big Ben is 1 times 404 spans.(officially the clock tower of Palace of Westminster, a.k.a. Houses of Parliament) (London, England)
The clock tower of the Palace of Westminster, which houses the bell known as "Big Ben," rises 420 spans. The tower has no elevator, and is therefore only accessible by climbing 334 steps to the top.
It's about nine-tenths as long as a Football (Soccer) Pitch.
In other words, 404 spans is 0.88 times the length of a Football (Soccer) Pitch, and the length of a Football (Soccer) Pitch is 1.14 times that amount.
It's about four-fifths as long as a Football field.
In other words, 404 spans is 0.841667 times the length of a Football field, and the length of a Football field is 1.18812 times that amount.(American) (total distance; per NFL regulation)
It's about one-and-one-fifth times as tall as a Giant Sequoia (tree).
In other words, the height of a Giant Sequoia (tree) is 0.83 times 404 spans.(a.k.a. Sequoiadendron giganteum, a.k.a. Sierra redwood, a.k.a. Wellingtonia)
It's about four-fifths as tall as St. Paul's Cathedral.
In other words, 404 spans is 0.8298 times the height of St. Paul's Cathedral, and the height of St. Paul's Cathedral is 1.205 times that amount.(London, England, United Kingdom)
It's about one-and-one-third times as long as The Wingspan of a 747.