Scale

Human height

From Preliminary Human Factors Guidelines for Traffic Management Centers (July 1999) FHWA, U.S. DoT

Males (North America)   5th % 50th 95th Stature 5′ 3⁵⁄₈″ 162㎝ 5′ 8¹⁄₄″ 173㎝ 6′ ³⁄₄″ 185㎝ Eye height 5′ ³⁄₄″ 154㎝ 5′ 4³⁄₄″ 164㎝ 5′ 8⁵⁄₈″ 174㎝ Sitting height 33.2″ 35.7″ 38.0″ Body width 18.8″ 20.9″ 22.8″

Females (North America)   5th % 50th 95th Stature 4′ 11″ 150㎝ 5′ 2⁷⁄₈″ 160㎝ 5′ 7¹⁄₈″ 170㎝ Eye height 4′ 9¹⁄₄″ 146㎝ 5′ ¹⁄₄″ 153㎝ 5′ 5¹⁄₄″ 166㎝ Sitting height 30.9″ 33.4″ 35.7″

When people stand normally (i.e., with some slump), their eye height lowers by about 1.6 in (4.1 cm) for males and by about 1.2 in (3.0 cm) for females.

Extrapolating from the data, male/female eye height is ∼95%/∼97% of stature, and body width is ∼30% of stature.

6mm

6㎜	∶ 171㎝	≡ 1 ∶ 285
6㎜	∶ 67¹⁄₂″	≡ 1 ∶ 285³⁄₄
6㎜	∶ 172㎝	≡ 1 ∶ 286²⁄₃
¹⁄₄″	∶ 6′	≡ 1 ∶ 288
1″	∶ 25′	≡ 1 ∶ 300
6㎜	∶ 180㎝	≡ 1 ∶ 300
6㎜	∶ 6′	≡ 1 ∶ 304.8