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You are here: Home > Particle Sieve Sizes
Looking for Custom Particle Size Classification?
Contact Us for a quote on classifying your material to any of the sizes shown below. 

Sieve opening
micron
 (0.001mm)
Sieve opening
 0.001 inches 
USA standard
Mesh No.
 (ASTM E11)
(AASHTO M92)
20um 0.8 635
27um 1.1 500
32um 1.3 450
38um 1.5 400
45um 1.8 325
53um 2.1 270
63um 2.5 230
75um 3.0 200
90um 3.5 170
106um 4.2 140
125um 4.9 120
150um 5.9 100
180um 7.1 80
212um 8.3 70
250um 9.8 60
300um 11.8 50
355um 14.0 45
425um 16.7 40
500um 19.7 35
600um 23.6 30
710um 28.0 25
850um 33.5 20
1000um (1.00mm) 39.4 18
1180um (1.18mm) 46.5 16
1400um (1.40mm) 55.1 14
1700um (1.70mm) 66.9 12
2000um (2.00mm) 78.7 10
2360um (2.36mm) 92.9 8
2800um (2.80mm) 110.2 7
3350um (3.35mm) 131.9 6
4000um (4.00mm) 157.5 5
4750um (4.75mm) 187.0 4
5600um (5.60mm) 220.5 3-1/2
 
We manufacture microspheres in a wide variety of colors in particles sizes from 10um to 1180um.
 10 gram samples of a wide variety of colors and properties are in stock and available for purchase.

Blue Functionalized MicrospheresMicrospheres in MicrostructureWhite Opaque MicrospheresBlack Magnetic MicrospheresClear MicroBeads

Looking for Custom Microspheres?  Look no further, we offer short runs of custom microspheres from 10 micron to 3mm in diameter.  High sphericity with multiple colors and properties, we even offer color matching. 
 
 
We can produce runs of microspheres from as little as 1 gram on up to 1000 Kilograms or more, Contact Us for more information.