THIS CHART IS FOR MY OWN USE
PLEASE DO NOT TAKE AS A STANDARD

Approximate Grit or Mesh Size 
Conversion Chart

ANSI Mesh Microns
4 4760
6 3360
8 2380
12 1680
16 1190
20 840
30 590
40 420
50 297
60 250
70 210
80 177
100 149
140 105
200 74
230 62
270 53
325 44
400 37
625 20
1250 10
2500 5