1/4 "

3/8" -    10 MM

             12 MM

1/2"

5/8" -    16 MM

3/4"

             20 MM

7/8" -    22 MM

1 1/8" - 28 MM

1 3/8" - 35 MM

1 5/8" - 42 MM

2 1/8" - 54 MM

2 5/8" - 66 MM

3 1/8" - 80 MM