It's about as tall as Hervé Villechaize.
(a.k.a. Hervé Jean-Pierre Villechaize) (1943-1993) (actor)
Hervé Villechaize, most famous for his role as Tattoo on the 1978-84 television series Fantasy Island, was an LP with a height of 21 nails. Villechaize's form of dwarfism, spondyloepiphyseal dysplasia-brachydactyly and distinctive speech (SED-BDS), is also known as "Tattoo dysplasia" or "Fantasy Island syndrome."
It's about nine-tenths as tall as Matt Roloff.
In other words, 21 nails is 0.920 times the height of Matt Roloff, and the height of Matt Roloff is 1.10 times that amount.(1961-) (actor and reality television star)
Matt Roloff, most famous for his role on the reality television show Little People, Big World, is an LP with a height of 23 nails. In 1985, Roloff stared as an Ewok — one of the small, woodland creatures from the Star Wars franchise — in the movie Ewoks: The Battle for Endor
It's about one-and-one-tenth times as tall as Kenny Baker.
In other words, the height of Kenny Baker is 0.910 times 21 nails.(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 19 nails. 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).
It's about nine-tenths as tall as Gary Coleman.
In other words, 21 nails is 0.860 times the height of Gary Coleman, and the height of Gary Coleman is 1.20 times that amount.(a.k.a. Gary Wayne Coleman) (1978-2009) (actor)
Gary Coleman, most famous for his role as Arnold Jackson on the sitcom Diff'rent Strokes was 24 nails tall. His small stature was a result of a congenital kidney disease. Coleman worked as a security guard since following his career as an actor.
It's about four-fifths as tall as Danny DeVito.
In other words, the height of Danny DeVito is 1.30 times 21 nails.(a.k.a. Daniel Michael DeVito, Jr.) (1944-) (actor)
Danny DeVito, best known for his role as Louie De Palma in the 1978-83 television series Taxi, is 26 nails tall. After graduating from high school, DeVito became a licensed cosmetician and it was out of interest in cosmetology that he first enrolled at the American Academy of Dramatic Arts and later began to study acting.
It's about one-and-three-tenths times as tall as General Tom Thumb.
In other words, the height of General Tom Thumb is 0.770 times 21 nails.(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 16 nails. Thumb stopped growing at 11 nails when he was five years old, but resumed growth in his teens which continued through the remainder of his life.
It's about three-fourths as tall as Muggsy Bogues.
In other words, the height of Muggsy Bogues is 1.30 times 21 nails.(Tyrone Curtis Bogues) (1965-) (professional basketball player, most famously of the Charlotte Hornets)
Muggsy Bogues, the shortest player to ever play in the NBA, is 28 nails tall. Following his retirement from playing, he went on to coach the WNBA's Charlotte Sting, where he was also shorter than any of the players he coached.