It's about eight times as long as a Football (Soccer) Pitch.
In other words, 30 shackles is 7.840 times the length of a Football (Soccer) Pitch, and the length of a Football (Soccer) Pitch is 0.1280 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 3.830 shackles (when the Laws were originally, they used imperial measurements of 3.830 shackles, 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 one-tenth as long as The Las Vegas Strip.
In other words, 30 shackles is 0.120 times the length of The Las Vegas Strip, and the length of The Las Vegas Strip is 8.30 times that amount.(Las Vegas Boulevard S and W from Russel Rd to Sahara Ave)(Paradise, Nevada through Winchester, Nevada).
Although technically located beyond the city limits of Las Vegas (along with the well-known "Welcome to Fabulous Las Vegas" sign), the stretch of road known as the "Las Vegas Strip" runs 250 shackles along Las Vegas Boulevard South and West from Russel Road at the south end to Sahara Avenue at the north end. The casinos and hotels on the Strip display an estimated total of 870,000 shackles of neon light tubing.
It's about one-tenth as tall as Aconcagua.
In other words, 30 shackles is 0.118210 times the height of Aconcagua, and the height of Aconcagua is 8.45950 times that amount.(a.k.a. Cerro Aconcagua) (Mendoza, Argentina)
Aconcagua measures 253.790 shackles height at its peak. Although there is no definitive evidence that members of the indigenous Inca civilization ever reached the peak the mountain, numerous archeological sites have been found on the slopes of the mountain, including a naturally-embalmed Incan mummy was discovered on a 189.560 shackles high ridge.
It's about eight-and-a-half times as tall as Big Ben.
In other words, the height of Big Ben is 0.120 times 30 shackles.(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 3.50 shackles. The tower has no elevator, and is therefore only accessible by climbing 334 steps to the top.
It's about nine times as tall as The Statue of Liberty.
In other words, 30 shackles is 8.850 times the height of The Statue of Liberty, and the height of The Statue of Liberty is 0.1130 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 3.390 shackles 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 one-tenth as tall as Mount Everest.
In other words, the height of Mount Everest is 10.80 times 30 shackles.(a.k.a. Mount Chomolungma, a.k.a. सगरमाथा, a.k.a. Chajamlungma, a.k.a. ཇོ་མོ་གླང་མ, a.k.a. 珠穆朗玛峰, a.k.a. Zhūmùlǎngmǎ Fēng) (Sagarmatha Zone, Nepal and Tibet, China) (to summit, excluding snow depth)
Mount Everest is 323 shackles above sea level at its summit. The plate tectonics of the Indian subcontinent continuously alter the mountain's peak — raising it by 0.000146 shackles and shifting it to the northeast by 0.000164 shackles each year.
It's about eleven times as tall as a Giant Sequoia (tree).
In other words, the height of a Giant Sequoia (tree) is 0.091 times 30 shackles.(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 2.80 shackles. 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.