Sieve sizes based on ASTM E 11:
mm
Inches
Sieve Size
75 mm
3
3"
50 mm
2
2"
37.5 mm
1.5
1-1/2"
25.0 mm
1
1"
19.0 mm
0.75
3/4"
9.5 mm
0.375
3/8"
4.75 mm
0.187
No. 4
2.36 mm
0.0937
No. 8
1.18 mm
0.0469
No. 16
600 um
0.0234
No. 30
300 um
0.0117
No. 50
75 um
No. 200
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