A4 sheet vs Pencil: size comparison
A4 sheet: 29.7 cm. Pencil: 19 cm. Both silhouettes are drawn at the same scale.
Size ratio: ×1.6
A4 sheet
29.7 cm
What is measured Height of an A4 sheet (ISO 216)
Fold an A4 in half and you get A5: the side ratio stays √2.
Source : Wikipedia — ISO 216
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