Light bulb vs Pencil: size comparison
Light bulb: 11 cm. Pencil: 19 cm. Both silhouettes are drawn at the same scale.
Size ratio: ×1.7
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
Pencil
19 cm
What is measured Length of a new graphite pencil
A single pencil can draw a line tens of kilometres long.
Source : Wikipedia — Pencil