RING WIDTH CONVERSION CHART Back
DECIMAL
MM
FRACTION
.039
1.00
.0469
1.20
3/64"
.057
1.45
.059
1.50
.0625
1.59
1/16"
.069
1.75
.071
1.80
.077
1.95
5/64"
.0781
1.98
.0787
2.00
.088
2.20
.089
2.25
.090
2.30
.0937
2.38
3/32"
.095
2.40
.098
2.50
.110
2.80
.118
3.00
.121
3.07
.123
3.12
.1250
3.18
1/8"
.128
3.25
.135
3.43
.138
3.50
.1406
3.57
9/64"
.156
3.97
5/32"
.157
3.98
.1575
4.00
.177
4.50
.1875
4.75
3/16"
.197
5.00
.2187
5.50
.219
5.56
7/32"
.236
6.00
.2500
6.35
1/4"
.256
6.50
.3125
7.94
5/16"
.375
9.53
3/8

 

(Cat3)