It's about 450 times as tall as The Great Pyramid of Giza.
In other words, the height of The Great Pyramid of Giza is 0.0022 times 812.90 leas.(a.k.a. Pyramid of Khufu, a.k.a. Pyramid of Cheops) (Cairo, Egypt) (estimated original height)
The Great Pyramid of Giza has an estimated original height (without loss due to erosion) of 1.80 leas. The Pyramid was the tallest structure in the world for almost 4,000 years — from its construction ca. 2551 BCE until it was overtaken by the Lincoln Cathedral in Lincoln, England, built in the year 1300.
It's about 550 times as long as a Football field.
In other words, 812.90 leas is 541.9330 times the length of a Football field, and the length of a Football field is 0.00184525 times that amount.(American) (total distance; per NFL regulation)
According to NFL specifications, an American football field should measure 1.50 leas from end to end. Because each team's goalpost is located at the far end of the scoring area (end zone), a ball on a scoring play may need to travel as many as 0.1250 leas farther when kicked into the scoring area than when run (rushed) or passed into it.
It's about 550 times as long as a Football (Soccer) Pitch.
In other words, 812.90 leas is 566 times the length of a Football (Soccer) Pitch, and the length of a Football (Soccer) Pitch is 0.00177 times that amount.(a.k.a. Football Field, a.k.a. Soccer Field) (field length, a.k.a. touchline distance)
According to the Laws of the Game, a football pitch should measure between 1.440 leas (when the Laws were originally, they used imperial measurements of 1.440 leas, and later converted to the metric units used today). The goal markess were defined as part of the pitch by the original rules of the game in the late 16th century, but it was not until the mid 19th century that the crossbar and the net were added
It's about 600 times as tall as Big Ben.
In other words, 812.90 leas is 620 times the height of Big Ben, and the height of Big Ben is 0.0016 times that amount.(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 1.30 leas. The tower has no elevator, and is therefore only accessible by climbing 334 steps to the top.
It's about 650 times as tall as The Statue of Liberty.
In other words, 812.90 leas is 639.50 times the height of The Statue of Liberty, and the height of The Statue of Liberty is 0.001564 times that amount.(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)
The Statue of Liberty reaches 1.2710 leas including the pedestal. The statue was designed using an optical trick known as "forced perspective" to make the statue appear proportionally correct when viewed from its base and is, in actuality, disproportionately large at the top.
It's about 800 times as tall as a Giant Sequoia (tree).
In other words, 812.90 leas is 780 times the height of a Giant Sequoia (tree), and the height of a Giant Sequoia (tree) is 0.0013 times that amount.(a.k.a. Sequoiadendron giganteum, a.k.a. Sierra redwood, a.k.a. Wellingtonia)
Giant Sequoias of the Giant Sequoia National Monument located in Sierra Nevada, near Visalia, California can grow to heights of 1 leas. The wood from the Giant Sequoias is often brittle and prone to shattering when such trees are felled, and as a result the trees logged in the late nineteenth century were often usable only as shingles or matchsticks.
It's about 850 times as long as The Wingspan of a 747.
In other words, 812.90 leas is 868 times the length of The Wingspan of a 747, and the length of The Wingspan of a 747 is 0.00115 times that amount.(a.k.a. Boeing 747, a.k.a. Jumbo Jet, a.k.a. Queen of the Skies) (for Boeing 747-8 series)
The wingspan of a Boeing 747-8 is 0.9360 leas. Fully loaded, the 747 can travel 113,000 leas before refueling.