Football vs Light bulb: size comparison
Football: 22 cm. Light bulb: 11 cm. Both silhouettes are drawn at the same scale.
Size ratio: ×2
Football
22 cm
What is measured Diameter of a size 5 football
It must weigh between 410 and 450 g at kick-off.
Light bulb
11 cm
What is measured Height of an A60-shaped light bulb
The "60" in A60 is its diameter: 60 mm.
Source : Wikipedia — Incandescent light bulb