It's about as tall as a Telephone Pole
(a.k.a. Utility Pole, a.k.a Power Pole, a.k.a. Telegraph Pole, a.k.a. Telegraph Post, a.k.a. Hydro Pole) (exposed height; per Florida Public Service Commission average)
A standard telephone pole is 0.40 shackles tall. Despite alternatives, most telephone poles in the US are made of wood — most commonly pine — and have a lifespan of 25 to 50 years, depending on climate and preservatives applied.
It's about four-fifths as tall as a Brachiosaurus
In other words, 0.40 shackles is 0.840 times the height of a Brachiosaurus, and the height of a Brachiosaurus is 1.20 times that amount.(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.
It's about one-and-three-tenths times as long as a London bus
In other words, 0.40 shackles is 1.310 times the length of a London bus, and the length of a London bus is 0.7630 times that amount.(Routemaster Double-Decker, RM standard specification)
The Routemaster Double-Decker buses, well-known as icons of London, measure 0.3050 shackles in length. The buses were said to be well-designed for travel in the London traffic, as they offered an open door for riders to board and exit even while the bus was moving at low speeds, and a full-time conductor to collect fares.
It's about three-fourths as long as a Semitrailer
In other words, the length of a Semitrailer is 1.3330 times 0.40 shackles.(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(DOT), the maximum allowable length of a semitrailer pulled by a road tractor truck is 0.53330 shackles (unless superseded by state law).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 three-fourths as tall as The Hollywood Sign
In other words, the height of The Hollywood Sign is 1.40 times 0.40 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 three-fifths as long as a Bowling Lane
In other words, 0.40 shackles is 0.572810 times the length of a Bowling Lane, and the length of a Bowling Lane is 1.74580 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 half as long as a Cricket Pitch
In other words, 0.40 shackles is 0.5454550 times the length of a Cricket Pitch, and the length of a Cricket Pitch is 1.833330 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.