mm

1/4
(6.3)

5/16
(7.9)

3/8
(9.5)

1/2
(12.7)

5/8
(15.8)

3/4
(19)

7/8
(22.2)

1
(25.4)

1 1/4
(31.7)

1 1/2
(38)

1 3/4
(44.4)

2
(50.8)

2 1/4
(57)

1 1/2
(38)

2 3/4
(70)

3
(76)