A4 paper size (ISO 216)

By Sebastian Corsini — real-time information, with years of fact-checking experience.

A4 paper measures 210 × 297 mm (8.27 × 11.69 in). The aspect ratio is 1:√2 (≈1.414), defined by ISO 216.

A4 paper dimensions
PropertyValue
StandardISO 216
Width210 mm (8.27 in)
Height297 mm (11.69 in)
Aspect ratio1:√2 (≈1.414)

Source: ISO 216.

FAQ

What are A4 paper dimensions?

A4 measures 210 × 297 mm (8.27 × 11.69 in).

What is the A4 aspect ratio?

1:√2 (≈1.414).

Which standard defines A4?

ISO 216.