Adult foot vs Smartphone: size comparison
Adult foot: 26.5 cm. Smartphone: 14.7 cm. Both silhouettes are drawn at the same scale.
Size ratio: ×1.8
Adult foot
26.5 cm
What is measured Length of an adult man's foot
The imperial foot is 30.48 cm, noticeably longer than a real foot.
Source : Wikipedia — Foot
Smartphone
14.7 cm
What is measured Height of a smartphone with a 6.1-inch screen
Screen size is measured diagonally: 6.1 inches is about 15.5 cm.
Source : Wikipedia — Smartphone