It's about four-fifths as long as a Woman's Footstep.
In other words, 554.1 milimeters is 0.84 times the length of a Woman's Footstep, and the length of a Woman's Footstep is 1.2 times that amount.(for healthy, middle-aged woman of average height; single step length)
It's about seven-tenths as long as a Man's Footstep.
In other words, the length of a Man's Footstep is 1.4 times 554.1 milimeters.(for healthy, middle-aged man of average height; single step length)
It's about one-and-two-fifths times as tall as a Bowling Pin.
In other words, 554.1 milimeters is 1.45 times the height of a Bowling Pin, and the height of a Bowling Pin is 0.69 times that amount.(USBC specifications; tenpin)
It's about two-thirds as tall as Verne Troyer.
In other words, the height of Verne Troyer is 1.5 times 554.1 milimeters.(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-fifths as tall as General Tom Thumb.
In other words, 554.1 milimeters is 0.61 times the height of General Tom Thumb, and the height of General Tom Thumb is 1.6 times that amount.(a.k.a. Charles Sherwood Stratton) (1838-1883) (circus performer; height at death)
It's about half as tall as Kenny Baker.
In other words, the height of Kenny Baker is 2 times 554.1 milimeters.(a.k.a. Kenneth George Baker) (1934-) (actor)
It's about half as tall as Hervé Villechaize.
In other words, 554.1 milimeters is 0.46 times the height of Hervé Villechaize, and the height of Hervé Villechaize is 2.2 times that amount.(a.k.a. Hervé Jean-Pierre Villechaize) (1943-1993) (actor)