A4 sheet vs Computer monitor: size comparison
A4 sheet: 29.7 cm. Computer monitor: 60 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
Computer monitor
60 cm
What is measured Width of a 27-inch computer monitor (16:9)
In 16:9, a 27-inch screen is 59.8 cm wide and 33.6 cm tall.
Source : Wikipedia — Computer monitor