A4 paper
A4 paper is an ISO 216 paper format commonly used internationally for letters, forms and printed documents.
29.7 cmLengthSmall wonders
A4 paper vs A3 paper
What are they, and what does the difference actually look like?
Two things. One honest scale.
Meet the pair
What these two things are
A3 paper
A3 paper is an ISO 216 paper format commonly used for drawings, diagrams and small posters.
42 cmLengthA3 paper has about 1.41 times the length of A4 paper.
Both marked spans share one linear scale. Artwork keeps its proportions; poses and surface detail are illustrative.
Measurements, assumptions & sources +
A4 paper
A4 is 210 × 297 mm. Its 0.06237 m² area is calculated from those nominal sides. The marked span uses the exact measurement; the generated paper texture and outline are illustrative.
University of Cambridge — ISO paper sizes
The marked length is calibrated. Unmeasured illustration details are representative.
A3 paper
297 × 420 mm. Area is derived from trimmed sides.
University of Cambridge — ISO paper sizes
The marked length is calibrated. Unmeasured illustration details are representative.
Change the comparison
Put something else beside it.
Measurement details
Why these numbers?
The visual compares length with length. The records below preserve each value’s basis and caveats.
A4 paper
29.7 cmLength · standard
A4 is 210 × 297 mm. Its 0.06237 m² area is calculated from those nominal sides. The marked span uses the exact measurement; the generated paper texture and outline are illustrative.
A3 paper
42 cmLength · standard
297 × 420 mm. Area is derived from trimmed sides.
- Comparing
- Length ↔ Length
- Relative size
- A3 paper is larger on this measurement by a factor of about 1.41. A3 paper's selected measurement is approximately 41.4% greater than A4 paper's.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
There’s always another scale
Follow your curiosity.
Everyday thingsA4 paper29.7 cmA4 paper is an ISO 216 paper format commonly used internationally for letters, forms and printed documents.Everyday thingsA3 paper42 cmA3 paper is an ISO 216 paper format commonly used for drawings, diagrams and small posters.
Everyday thingsA5 paper21 cmA5 paper is an ISO 216 paper format commonly used for notebooks, leaflets and small documents.
Everyday thingsSmartphone15 cmA smartphone is a portable electronic device that combines mobile phone functions with internet access and apps.
Everyday thingsDesk1.2 mA desk is a table designed as a work surface for writing, reading or using equipment such as a computer.Side by side
Another point of view.
