Grain of sand
A grain of sand is a tiny fragment of rock or mineral, commonly found on beaches and in soil.
How big is it?
500 µm across
Diameter · example
A little perspective
About 1.67 times the characteristic size of Salt crystal.
Salt crystal: A salt crystal is a small, naturally occurring or manufactured piece of sodium chloride used in food and industry.
Measurements, assumptions & sources +
Grain of sand
Separate illustrative measurements: 0.5 mm across; 1 mg mass. Mineral and shape vary.
Defined examples — our methodology
The marked diameter is calibrated. Unmeasured illustration details are representative.
Salt crystal
A chosen 0.3 mm table-salt crystal. The irregular illustration is a scale specimen.
University of Utah — Cell size and scale
The marked characteristic size is calibrated. Unmeasured illustration details are representative.
Change your perspective
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Why this measurement?
Why we use 500 µm
For comparison, this page uses diameter. This is labelled example: an explicit comparison model rather than a claim that every example has the same value.
Separate illustrative measurements: 0.5 mm across; 1 mg mass. Mineral and shape vary.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Grain of sand dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 500 µm | Not recorded | example | |
| 1 mg | Not recorded | example |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · MicroscopicSalt crystal300 µmA salt crystal is a small, naturally occurring or manufactured piece of sodium chloride used in food and industry.
Around the same scale · MicroscopicAmoeba cell300 µmAn amoeba cell is a single-celled organism that moves and engulfs food by extending temporary projections called pseudopodia.
Nearest higher value · Living thingsPoppy seed1 mmA poppy seed is an edible seed produced by plants in the poppy family and commonly used in breads and other foods.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.
MicroscopicSalt crystal300 µmA salt crystal is a small, naturally occurring or manufactured piece of sodium chloride used in food and industry.Living thingsPoppy seed1 mmA poppy seed is an edible seed produced by plants in the poppy family and commonly used in breads and other foods.
Everyday thingsChia seed2 mmA chia seed is the edible seed of the Salvia hispanica plant, often used in foods such as puddings and cereals.
Everyday thingsQuinoa seed2 mmA quinoa seed is the edible seed of the Chenopodium quinoa plant, commonly used as a grain substitute in cooking.
Living thingsCopepod2 mmA copepod is a tiny aquatic crustacean found in marine and freshwater environments, playing a key role in aquatic food webs.
People70 µm hair70 µmA hair is a slender strand of protein that grows from the skin of humans and other mammals.
Everyday thingsSheet of paper100 µmA sheet of paper is a flat material made from cellulose pulp, used for writing, printing or packaging.MicroscopicAmoeba cell300 µmAn amoeba cell is a single-celled organism that moves and engulfs food by extending temporary projections called pseudopodia.