Adult vs Child: size comparison
Adult: 1.75 m. Child: 1.16 m. Both silhouettes are drawn at the same scale.
Size ratio: ×1.5
Adult
1.75 m
What is measured Height of an adult man (global ballpark)
You're slightly taller in the morning: spinal discs compress during the day.
Source : Wikipedia — Human height
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