A3 paper
A3 paper is an ISO 216 paper format commonly used for drawings, diagrams and small posters.
How big is it?
42 cm long
Also 16.54 in
Length · standard
A little perspective
About the same scale as Boomerang.
Boomerang: A boomerang is a curved, flat tool traditionally used for sport or hunting, designed to return to the thrower when thrown correctly.
Measurements, assumptions & sources +
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.
Boomerang
A defined two-bladed returning boomerang 40 cm from tip to tip and 90 g. Throwing sticks and sporting boomerangs vary in outline; the curved flight path is not part of the measurement.
Encyclopaedia Britannica — Boomerang
The marked defined tip-to-tip span is calibrated. Unmeasured illustration details are representative.
Change your perspective
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Why this measurement?
Why we use 42 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.
297 × 420 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
A3 paper dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 42 cm | Not recorded | standard | |
| 1,247 cm² | Not recorded | standard | |
| 29.7 cm | Not recorded | standard | |
| 42 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 thingsCassava root35 cmCassava root is the starchy, edible tuber of the tropical plant Manihot esculenta, commonly used as a staple food.
Around the same scale · Living thingsRabbit40 cmA rabbit is a herbivorous mammal with long ears and strong hind legs, often kept as a pet or found in grasslands and forests.
Nearest higher value · PeopleHuman femur45 cmThe human femur is the thigh bone, connecting the hip to the knee and supporting body weight during movement.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.
SportBoomerang40 cmA boomerang is a curved, flat tool traditionally used for sport or hunting, designed to return to the thrower when thrown correctly.PeopleHuman femur45 cmThe human femur is the thigh bone, connecting the hip to the knee and supporting body weight during movement.
Living thingsPlatypus50 cmThe platypus is a semi-aquatic mammal native to eastern Australia, notable for its duck-like bill and egg-laying reproduction.Everyday thingsCassava root35 cmCassava root is the starchy, edible tuber of the tropical plant Manihot esculenta, commonly used as a staple food.
SpaceSputnik 158 cmSputnik 1 was the first artificial satellite launched into Earth orbit by the Soviet Union in 1957.
SportTen-pin bowling pin38.1 cmA ten-pin bowling pin is a skittle-shaped target used in bowling, designed to be knocked down by a rolling ball.
ContainersSamovar urn5 LA samovar urn is a traditional metal vessel used to heat and serve tea, especially in Russian and Central Asian cultures.
Living thingsMeerkat50 cmA meerkat is a small, social mammal from southern Africa that lives in cooperative groups and forages for insects and other small animals.