It's about as long as a Woman's Footstep.
It's about nine-tenths as long as a Man's Footstep.
In other words, 681.5 milimeters is 0.86 times the length of a Man's Footstep, and the length of a Man's Footstep is 1.2 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 790 milimeters, for an average stride (two-step's length) of 1,600 milimeters. The average person walks at a speed of about 1.3 m/s
It's about four-fifths as tall as Verne Troyer.
In other words, 681.5 milimeters is 0.84 times the height of Verne Troyer, and the height of Verne Troyer is 1.2 times that amount.(1969-) (actor)
Verne Troyer, most famous for his role as Mini-Me in the Austin Powers series, is an LP with a height of 810 milimeters. Troyer's first role was as a stunt double for a baby in the 1994 film Baby's Day Out.
It's about three-fourths as tall as General Tom Thumb.
In other words, the height of General Tom Thumb is 1.3 times 681.5 milimeters.(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 910 milimeters. Thumb stopped growing at 640 milimeters when he was five years old, but resumed growth in his teens which continued through the remainder of his life.
It's about three-fifths as tall as Kenny Baker.
In other words, 681.5 milimeters is 0.62 times the height of Kenny Baker, and the height of Kenny Baker is 1.6 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 1,100 milimeters. 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 three-fifths as tall as Hervé Villechaize.
In other words, 681.5 milimeters is 0.57 times the height of Hervé Villechaize, and the height of Hervé Villechaize is 1.8 times that amount.(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 1,200 milimeters. 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 one-and-four-fifths times as tall as a Bowling Pin.
In other words, 681.5 milimeters is 1.79 times the height of a Bowling Pin, and the height of a Bowling Pin is 0.559 times that amount.(USBC specifications; tenpin)
According to the United States Bowling Congress specifications, a tenpin bowling pin should be within 0.794 milimeters of 381 milimeters in height. The USBC further mandates that certified pins be made of sugar maple wood, unless otherwise approved by the organization.