12 November 2013
Particle size comparison chart
There are a number of units and scales commonly used to measure particle size. These either refer to average particle diameter measured in units of length, typically microns, or refer to a smallest mesh size through which the particles will pass. The following table sets out conversions between a variety of systems:
US MESH
TYLER SCREEN
BSS MESH
MICRONS
INCHES
MILLIMETRES
EXAMPLE
18
16
16
1000
0.0394
1.000
20
20
18
841
0.0331
0.841
25
24
22
707
0.0280
0.707
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