Table 1.

Characteristics of biological extracellular vesicles and other particles^a

particle type	diameter (nm)	density (g·mℓ−1)	mass (MDa)
High density lipoprotein b	5 to 15	1.06 to 1.21	~0.05 to 0.6
Low density lipoprotein b	18 to 28	1.03- 1.063	~2 to 7
Very low density lipoprotein b	30 to 80	~1.006	~8 to 80
Exomeres c	~30 to 50	0.93 to 1.06	~8 to 40
Exosomes d	30 to 120	1.12 to 1.21	~10 to 1200
Microvesicles d	50 to 1000	1.16	~50 to 4 × 106
Virions d	~30 to ~140	1.16 to 1.18	~10 to 1000
Casein micelle e	50 to 500	1.06	~1 to 1000

^aDiameters, densities, and masses are derived from literature data as indicated in the text unless otherwise noted here. In cases where we derive a physical parameter from others we have assumed that particles are spherical.

^bParticle diameters and densities are taken from reference 78.

^cParticle diameter and density values from references 16, 27.

^dThe diameters and densities of microvesicles, exosomes and virions are taken from reference 76, 77.

^eValues for casein micelle diameters and densities are taken from reference 48.