Door key
5.5 cm - Length; example.
A door key is a small metal tool designed to operate the lock mechanism of a door.
A chosen 55 mm, 9 g household key.
Defined examples — our methodologyDoor key vs US quarter: length comparison
The length of a door key is about 2.27 times the diameter of a US quarter. Selected basis: an example for Door key; approximate values.
- Door key
- Length
- US quarter
- Diameter
Door key
5.5 cmLength
0 - shared origin
US quarter
2.426 cmDiameter
0 - shared origin
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. Horizontal rulers compare the selected spans; vertical brackets also identify height on the artwork.
In perspective2.27 times
Measurements, assumptions & sources
US quarter
2.426 cm - Diameter; specified.
A US quarter is a coin worth twenty-five cents, commonly used in United States currency.
Standard copper-nickel clad US quarter: 24.26 mm diameter, 1.75 mm thickness and 5.67 g mass. Earlier silver quarters do not share this mass. The illustrated relief is representative; the circular rim is the measured span.
US Mint — circulating coin specifications
Compare something else
There’s always another scale
Follow your curiosity.
Everyday thingsDoor key5.5 cmA door key is a small metal tool designed to operate the lock mechanism of a door.
Everyday thingsUS quarter2.426 cmA US quarter is a coin worth twenty-five cents, commonly used in United States currency.
PeopleHuman1.75 mA human is a primate of the species Homo sapiens, distinguished by habitual upright walking, language and complex tool use.
TransportFamily car4.5 mA family car is a motor vehicle designed to carry several passengers and their belongings.
TransportDouble-decker bus11 mA double-decker bus is a passenger vehicle with two levels, used for public transport.
Living thingsHoneybee1.5 cmA honeybee is a social insect that lives in a colony and gathers nectar and pollen from flowers.
Everyday thingsUS dime1.791 cmA US dime is a ten-cent coin, the smallest denomination in US currency above the penny and nickel.
Everyday thingsUS nickel2.121 cmA US nickel is a five-cent coin made primarily of a copper-nickel alloy.Side by side
Another point of view.
Illustrative artwork · not to scale
Illustrative artwork · not to scale
Illustrative artwork · not to scale
Illustrative artwork · not to scaleGot a good eye for scale?