Smartphone
A smartphone is a portable electronic device that combines mobile phone functions with internet access and apps.
Also known as: phone
How big is it?
15 cm long
Also 5.906 in
Length · example
A little perspective
Smartphone vs Human brain: length comparison
The length of a smartphone is approximately equal to the front-to-back length of the human brain.
A smartphone is a portable electronic device that combines mobile phone functions with internet access and apps.
The human brain is the organ that processes sensory information and coordinates thought, memory, movement and many body functions.
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.
Measurements, assumptions & sources +
Smartphone
Length: 15 cm; example.
A 150 × 72 mm, 200 g example phone.
Defined examples — our methodology
The marked length is calibrated. Unmeasured illustration details are representative.
Human brain
Representative front-to-back length: 15 cm; defined specimen; range 14 cm–17 cm.
A defined adult-brain specimen 15 cm front to back and 1.4 kg. Brain size and mass vary by person; these values are comparison anchors, not health benchmarks.
Defined examples — our methodology
The marked representative front-to-back length is calibrated. Unmeasured illustration details are representative.
Use the visual comparison to explore its scale, then check the measurements and sources.
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Why this measurement?
Why we use 15 cm
We compare the length of a smartphone. This is an illustrative comparison value, not a claim that every example is the same.
A 150 × 72 mm, 200 g example phone.
The marked vertical span follows the measured feature, not the edges of the image. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 15 cm | Not recorded | example | |
| 108 cm² | Not recorded | example | |
| 200 g | Not recorded | example | |
| 7.2 cm | Not recorded | example | |
| 15 cm | Not recorded | example |
Around this scale
Explore nearby values.
Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Nearest lower valueEveryday objectsA6 paper14.8 cmLengthA6 paper is an ISO 216 paper format commonly used for postcards, small flyers and pocket stationery.
Around the same scaleEveryday objectsOcarina15 cmDefined instrument lengthAn ocarina is a wind instrument, usually made of ceramic, played by blowing into it and covering finger holes to produce musical notes.
Nearest higher valueEveryday objectsBroccoli head16 cmDefined crown diameterA broccoli head is the compact, edible crown of the broccoli plant, consisting of clustered green flower buds.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
PeopleHuman brain15 cmThe human brain is the organ that processes sensory information and coordinates thought, memory, movement and many body functions.
Living thingsFeather star15 cmA feather star is a marine crinoid with multiple feathery arms used for filter feeding and movement on the sea floor.
Everyday thingsCantaloupe15 cmA cantaloupe is a round, sweet melon with a netted rind and orange flesh, commonly eaten as a fruit.
SpaceVanguard 116.5 cmVanguard 1 is an early American satellite launched in 1958, notable for being the oldest human-made object still in orbit.
SportClimbing piton15 cmA climbing piton is a metal spike driven into rock cracks to provide protection or anchor points during climbing.
Everyday thingsSweet potato15 cmA sweet potato is the edible, starchy root of the plant Ipomoea batatas, widely grown for food.
Living thingsGeoduck17 cmA geoduck is a large burrowing marine clam with a comparatively small shell and a very long siphon.
PeopleHuman heart12 cmA human heart is a muscular organ that pumps blood through the circulatory system.