Mesh size
US STD Sieve

Opening Size (Inches)

Opening Size (millimeters)

Opening Size (microns)

10

.0787

2.00

2000

12

.0661

1.679

1680

14

.0555

1.410

1410

16

.0469

1.191

1190

18

.0394

1.001

1000

20

.0331

0.841

841

25

.0278

0.706

707

30

.0234

0.594

595

35

.0197

0.500

500

40

.0165

0.419

420

45

.0139

0.353

354

50

.0117

0.297

297

60

.0098

0.249

250

70

.0083

0.211

210

80

.007

0.178

177

100

.0059

0.150

149

120

.0049

0.125

125

140

.0041

0.104

105

170

.0035

0.089

88

230

.0025

0.064

63

270

.0021

0.053

53

325

.0017

0.043

44

400

.0015

0.038

37