A4 sheet vs Croissant: size comparison
A4 sheet: 29.7 cm. Croissant: 15 cm. Both silhouettes are drawn at the same scale.
Size ratio: ×2
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
Croissant
15 cm
What is measured Length of a bakery croissant
The croissant descends from the Austrian kipferl, which reached Paris in the 19th century.
Source : Wikipedia — Croissant