US penny
A US penny is a copper-plated coin worth one cent in United States currency.
How big is it?
1.905 cm across
Also 0.75 in
Diameter · specified
A little perspective
About the same scale as Sea angel.
Sea angel: A sea angel is a small, transparent swimming sea slug with wing-like appendages, found in cold ocean waters.
Measurements, assumptions & sources +
US penny
19.05 mm nominal diameter; 2.5 g.
US Mint — circulating coin specifications
The marked diameter is calibrated. Unmeasured illustration details are representative.
Sea angel
A defined 2 cm adult sea angel modelled on Clione limacina. Body length excludes the extended wing-like parapodia; species, maturity and posture change the span.
The marked defined body length is calibrated. Unmeasured illustration details are representative.
Change your perspective
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Why this measurement?
Why we use 1.905 cm
For comparison, this page uses diameter. The record labels this value specified, so the stated convention rather than an inferred average controls the comparison.
19.05 mm nominal diameter; 2.5 g.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
US penny dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 1.905 cm | Not recorded | specified | |
| 2.5 g | Not recorded | specified |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · Everyday thingsUK 5p coin1.8 cmA UK 5p coin is the five-pence denomination of the decimal pound sterling circulation coinage.
Around the same scale · Everyday thingsRaspberry2 cmA raspberry is an edible fruit from the Rubus genus, composed of many small drupelets and commonly red in colour.
Nearest higher value · Everyday things20 × 30 mm stamp2 cmA postage stamp is a small adhesive label placed on mail to show payment for postal services.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- US Mint — circulating coin specificationsNominal current-format coin dimensions and masses.
There’s always another scale
Follow your curiosity.
Living thingsSea angel2 cmA sea angel is a small, transparent swimming sea slug with wing-like appendages, found in cold ocean waters.Everyday thingsUK 5p coin1.8 cmA UK 5p coin is the five-pence denomination of the decimal pound sterling circulation coinage.
PeopleHuman eyeball2.4 cmThe human eyeball is the globe-shaped organ that receives light and begins the process of vision.
Everyday thingsUS dime1.791 cmA US dime is a ten-cent coin, the smallest denomination in US currency above the penny and nickel.
Living thingsHoneybee1.5 cmA honeybee is a social insect that lives in a colony and gathers nectar and pollen from flowers.
Everyday thingsUK 1p coin2.03 cmA UK 1p coin is the one-penny denomination of the decimal pound sterling circulation coinage.
SportSquash ball4 cmA squash ball is a small, hollow rubber ball used in the sport of squash.
PeopleFingernail1.5 cmA fingernail is the hard, protective covering at the tip of a human finger, composed of keratin.