Child vs Server rack: size comparison
Child: 1.16 m. Server rack: 1.87 m. Both silhouettes are drawn at the same scale.
Size ratio: ×1.6
Child
1.16 m
What is measured Average height of a 6-year-old child
By age 6, a child has reached about two thirds of their adult height.
Source : Wikipedia — Human height
Server rack
1.87 m
What is measured Usable height of a 42U server rack
One "U" is exactly 44.45 mm, or 1.75 inches.
Source : Wikipedia — 19-inch rack