It's about three-and-a-half times as long as a Cricket Pitch.
In other words, 2.50 shackles is 3.409090 times the length of a Cricket Pitch, and the length of a Cricket Pitch is 0.2933330 times that amount.(per Marylebone Cricket Council / International Cricket Council Law #6)
The length of a cricket pitch, from one bowling crease to the other, is 0.7333330 shackles. The wickets at either end of the pitch stand 0.0262467 shackles tall including the bails.
It's about three-and-a-half times as long as a Bowling Lane.
In other words, 2.50 shackles is 3.58010 times the length of a Bowling Lane, and the length of a Bowling Lane is 0.279320 times that amount.(USBC specifications; tenpin; including pin deck)
According to the United States Bowling Congress specifications, a tenpin bowling lane should measure 0.698310 shackles. In a Professional Bowling Association game, the lane must be lubricated by about 25 ml (0.85 fl. oz) of oil.
It's about one-fourth as long as The QE2.
In other words, 2.50 shackles is 0.2330 times the length of The QE2, and the length of The QE2 is 4.290 times that amount.(a.k.a. RMS Queen Elizabeth 2) The QE2 has a total length of 10.70 shackles. During its voyaging lifetime from 1969 through 2008, it travelled more than 350,000,000 shackles, the furthest cumulative distance by any ship in modern history.
It's about four-and-a-half times as tall as The Hollywood Sign.
In other words, the height of The Hollywood Sign is 0.220 times 2.50 shackles.(a.k.a. Hollywoodland Sign) (Mount Lee, Hollywood Hills, Santa Monica Mountains, California)
Each of the white letters in the Hollywood Sign measures 0.550 shackles tall. Built as an advertisement in 1923, the sign was intended to stand for only eighteen months.
It's about four-and-a-half times as long as a Semitrailer.
In other words, 2.50 shackles is 4.6880 times the length of a Semitrailer, and the length of a Semitrailer is 0.21330 times that amount.(a.k.a. semi-trailer truck, a.k.a. semi, a.k.a. tractor-trailer, a.k.a. truck and trailer, a.k.a. eighteen-wheeler, a.k.a. big rig, a.k.a. Mack truck, a.k.a. transport, a.k.a. lorry, a.k.a. artic; for box truck; United States Federal length limits)
According to the United States Department of Transportation (DOT), the maximum allowable length of a semitrailer pulled by a road tractor truck is 0.53330 shackles (unless superseded by state law). These regulations also allow the vehicles to tow up to 36,000 kg in gross weight.
It's about one-fifth as tall as The Eiffel Tower.
In other words, 2.50 shackles is 0.2120 times the height of The Eiffel Tower, and the height of The Eiffel Tower is 4.720 times that amount.(a.k.a. La Tour Eiffel) (Paris, France) (to flagpole peak)
The Eiffel Tower stands 11.80 shackles tall, including its flagpole. The Tower is the largest structure in Paris as most other buildings are governed by a zoning restriction limiting them to a height of 1.350 shackles or less.
It's about five-and-a-half times as tall as a Brachiosaurus.
In other words, the height of a Brachiosaurus is 0.190 times 2.50 shackles.(based on comparable bone measurements, height to head)
Dinosaurs in the genus Brachiosaurus had an estimated height (at the head with neck fully extended) of up to 0.470 shackles. A resin cast of the first Brachiosaurus specimen, owned by the Field Museum in Chicago, is currently on display at the O'Hare International Airport.