It's about half as tall as a Bowling Pin
In other words, 20 centimeters is 0.5250 times the height of a Bowling Pin, and the height of a Bowling Pin is 1.90 times that amount.(USBC specifications; tenpin)
According to the United States Bowling Congress specifications, a tenpin bowling pin should be within 0.079375 cm of 38.1 cm in height. The USBC further mandates that certified pins be made of sugar maple wood, unless otherwise approved by the organization.
It's about three-tenths as long as a Woman's Footstep
In other words, the length of a Woman's Footstep is 3.30 times 20 centimeters.(for healthy, middle-aged woman of average height; single step length)
According to studies by The University of Oklahoma's Health Sciences Center, the average length of a woman's step is 66 centimeters, for an average stride (two-step's length) of 130 centimeters. The average person walks at a speed of about 1.3 m/s
It's about three-and-a-half times as tall as a Golf Tee
In other words, the height of a Golf Tee is 0.270 times 20 centimeters.The most common golf tee size and the length preferred for iron and most wood clubs is 5.4 cm tall. The tee did not come into common use until it was promoted by professional golfers Walter Hagen and Joe Kirkwood, as part of a marketing effort by the patent-holder of the well-known, "Reddy Tee."
It's about one-fourth as long as a Man's Footstep
In other words, 20 centimeters is 0.250 times the length of a Man's Footstep, and the length of a Man's Footstep is 4 times that amount.(for healthy, middle-aged man of average height; single step length)
According to studies by The University of Oklahoma's Health Sciences Center, the average length of a man's step is 79 centimeters, for an average stride (two-step's length) of 160 centimeters. The average person walks at a speed of about 1.3 m/s
It's about one-fourth as tall as Verne Troyer
In other words, 20 centimeters is 0.250 times the height of Verne Troyer, and the height of Verne Troyer is 4 times that amount.(1969-2018) (actor)
Verne Troyer, most famous for his role as Mini-Me in the Austin Powers series, was an LP with a height of 81 centimeters. Troyer's first role was as a stunt double for a baby in the 1994 film Baby's Day Out.
It's about one-fifth as tall as General Tom Thumb
In other words, 20 centimeters is 0.220 times the height of General Tom Thumb, and the height of General Tom Thumb is 4.50 times that amount.(a.k.a. Charles Sherwood Stratton) (1838-1883) (circus performer; height at death)
General Tom Thumb was an LP with a height (at his death) of 91 centimeters. Thumb stopped growing at 64 centimeters when he was five years old, but resumed growth in his teens which continued through the remainder of his life.
It's about one-fifth as tall as Kenny Baker
In other words, 20 centimeters is 0.180 times the height of Kenny Baker, and the height of Kenny Baker is 5.60 times that amount.(a.k.a. Kenneth George Baker) (1934-) (actor)
Kenny Baker, most famous for his role as R2-D2 in the Star Wars film franchise, is an LP with a height of 110 centimeters. Baker and his wife, Eileen, both made brief appearances as the small, woodland creatures known as Ewoks in the 1984 Star Wars movie, Star Wars: Return of the Jedi (a.k.a. Star Wars Episode VI: Return of the Jedi).