The microspheres are 32–40 micrometers in diameter (500 micrometers could fit in the period at the end of this sentence).
A prototype Metascreen is a claimed invisibility cloak, which is just few micrometers thick and to a limited extent can hide 3D objects from microwaves in their natural environment, in their natural positions, in all directions, and from all of the observer's positions.
In radio astronomy, the unit flik was coined by a group at Lockheed in Palo Alto, California as a substitute for the SI derived unit W cm−2 sr−1 µm−1, or watts divided by centimeters squared, steradians, and micrometers.
Isotopically pure 13C diamond layers 20 micrometers thick are used as stress sensors due to the advantageous Raman spectroscopy properties of 13C.
The mature spermatozoids of the fern Asplenium onopteris are 8 to 8.5 micrometers in length and contain 50 flagella.