A5 paper
A5 paper is an ISO 216 paper format commonly used for notebooks, leaflets and small documents.
How big is it?
21 cm long
Also 8.268 in
Length · standard
A little perspective
About the same scale as Disc golf driver.
Disc golf driver: A disc golf driver is a specialised flying disc designed for long-distance throws in the sport of disc golf.
Measurements, assumptions & sources +
A5 paper
148 × 210 mm. Area is derived from trimmed sides.
University of Cambridge — ISO paper sizes
The marked length is calibrated. Unmeasured illustration details are representative.
Disc golf driver
A defined PDGA-approved driver 21.1 cm in outside diameter and 175 g, near the permitted maximum mass for that diameter. Rim profile varies by approved model; printed graphics are not part of the measurement.
Professional Disc Golf Association — Technical standards
The marked specified outside diameter is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 21 cm
For comparison, this page uses length. The record labels this value standard, so the stated convention rather than an inferred average controls the comparison.
148 × 210 mm. Area is derived from trimmed sides.
The marked vertical span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
A5 paper dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 21 cm | Not recorded | standard | |
| 310.8 cm² | Not recorded | standard | |
| 14.8 cm | Not recorded | standard | |
| 21 cm | Not recorded | standard |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · Everyday thingsPaperback book20 cmA paperback book is a collection of printed pages bound with a flexible paper cover for reading.
Around the same scale · Everyday thingsCabbage head20 cmA cabbage head is the compact, leafy, edible part of a green cabbage plant, commonly used as a vegetable.
Nearest higher value · Fundamental physicsHydrogen 21 cm hyperfine transition21.1 cmThis is a change in the energy state of neutral hydrogen atoms that produces or absorbs radio waves, widely used in radio astronomy.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- University of Cambridge — ISO paper sizesNominal trimmed A-series dimensions. Area computed from millimetre-rounded sides.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
SportDisc golf driver21.1 cmA disc golf driver is a specialised flying disc designed for long-distance throws in the sport of disc golf.
Living thingsSea hare20 cmA sea hare is a soft-bodied marine mollusc related to sea slugs, capable of releasing ink when threatened.Everyday thingsCabbage head20 cmA cabbage head is the compact, leafy, edible part of a green cabbage plant, commonly used as a vegetable.
SpaceVanguard 116.5 cmVanguard 1 is an early American satellite launched in 1958, notable for being the oldest human-made object still in orbit.
PeopleHuman liver28 cmThe human liver is a vital organ in the abdomen that processes nutrients, detoxifies chemicals, and produces bile for digestion.
Built worldBrick21.5 cmA brick is a rectangular block made from clay or concrete, commonly used in building walls and structures.
ContainersFrench coffee press1 LA French coffee press is a device for brewing coffee by steeping ground beans in hot water and separating them with a plunger and mesh filter.
SportSize 5 football430 gAn association-football ball is an air-filled spherical ball designed to be kicked, passed and headed during play.