It's about 100 times as long as Baseball base distances.
In other words, 20,000 shaftments is 111.110 times the length of Baseball base distances, and the length of Baseball base distances is 0.0090001 times that amount.(MLB Official Baseball Rules specification)
According to MLB Official Baseball Rules, the distance between baseball diamond bases is 180 shaftments. 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-one-hundred-fiftieth as long as The Grand Canyon.
In other words, 20,000 shaftments is 0.00683 times the length of The Grand Canyon, and the length of The Grand Canyon is 146 times that amount.(a.k.a. Gran Cañón) (Arizona) (Colorado River miles measure)
The Grand Canyon has a total length of 2,930,000 shaftments along the course of the Colorado River at its bottom. Having opened in early 2007, the Grand Canyon Skywalk allows tourists to stand on a horseshoe-shaped glass walkway 7,220 shaftments above the floor of Granite Gorge.
It's about 150 times as long as a Cricket Pitch.
In other words, 20,000 shaftments is 151.5150 times the length of a Cricket Pitch, and the length of a Cricket Pitch is 0.00660001 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 132 shaftments. The wickets at either end of the pitch stand 4.724410 shaftments tall including the bails.
It's about 150 times as long as a Bowling Lane.
In other words, 20,000 shaftments is 159.110 times the length of a Bowling Lane, and the length of a Bowling Lane is 0.006285 times that amount.(USBC specifications; tenpin; including pin deck)
According to the United States Bowling Congress specifications, a tenpin bowling lane should measure 125.70 shaftments. In a Professional Bowling Association game, the lane must be lubricated by about 25 ml (0.85 fl. oz) of oil.
It's about 200 times as tall as The Hollywood Sign.
In other words, the height of The Hollywood Sign is 0.005 times 20,000 shaftments.(a.k.a. Hollywoodland Sign) (Mount Lee, Hollywood Hills, Santa Monica Mountains, California)
Each of the white letters in the Hollywood Sign measures 98 shaftments tall. Built as an advertisement in 1923, the sign was intended to stand for only eighteen months.
It's about 200 times as long as a Semitrailer.
In other words, 20,000 shaftments is 208.30 times the length of a Semitrailer, and the length of a Semitrailer is 0.004801 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 96 shaftments (unless superseded by state law). These regulations also allow the vehicles to tow up to 36,000 kg in gross weight.
It's about 250 times as tall as a Brachiosaurus.
In other words, the height of a Brachiosaurus is 0.0043 times 20,000 shaftments.(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 85 shaftments. 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.