It's about as long as a Bowling Lane.
In other words, the length of a Bowling Lane is 1.0488 times 39.950 cubits.(USBC specifications; tenpin; including pin deck)
According to the United States Bowling Congress specifications, a tenpin bowling lane should measure 41.8990 cubits. In a Professional Bowling Association game, the lane must be lubricated by about 25 ml (0.85 fl. oz) of oil.
It's about nine-tenths as long as a Cricket Pitch.
In other words, 39.950 cubits is 0.9079550 times the length of a Cricket Pitch, and the length of a Cricket Pitch is 1.101380 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 44 cubits. The wickets at either end of the pitch stand 1.57480 cubits tall including the bails.
It's about one-and-one-fifth times as tall as The Hollywood Sign.
In other words, the height of The Hollywood Sign is 0.830 times 39.950 cubits.(a.k.a. Hollywoodland Sign) (Mount Lee, Hollywood Hills, Santa Monica Mountains, California)
Each of the white letters in the Hollywood Sign measures 33 cubits tall. Built as an advertisement in 1923, the sign was intended to stand for only eighteen months.
It's about one-and-one-fourth times as long as a Semitrailer.
In other words, 39.950 cubits is 1.2480 times the length of a Semitrailer, and the length of a Semitrailer is 0.80130 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Transportation (DOT), the maximum allowable length of a semitrailer pulled by a road tractor truck is 32 cubits (unless superseded by state law).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-and-two-fifths times as tall as a Brachiosaurus.
In other words, the height of a Brachiosaurus is 0.710 times 39.950 cubits.(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 28 cubits. 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 two-thirds as long as Baseball base distances.
In other words, 39.950 cubits is 0.665830 times the length of Baseball base distances, and the length of Baseball base distances is 1.50190 times that amount.(MLB Official Baseball Rules specification)
According to MLB Official Baseball Rules, the distance between baseball diamond bases is 60 cubits. While second and home base are located upon the corners of the 27.432 sq. m area created by the bases, first and third base are placed within that square, to better allow the umpires to judge whether a ball is fair or foul.
It's about one-and-seven-tenths times as tall as a Telephone Pole.
In other words, the height of a Telephone Pole is 0.590 times 39.950 cubits.(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 24 cubits 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.