In inch

In metric unit(mm)

In metric unit(mm)

1/4" x 1/4"

6.4mm x 6.4mm

22,23,24

3/8" x 3/8"

10.6mm x 10.6mm

19,20,21,22

1/2" x 1/2"

12.7mm x 12.7mm

16,17,18,19,20,21,22,23

5/8" x 5/8"

16mm x 16mm

18,19,20,21

3/4" x 3/4"

19.1mm x 19.1mm

16,17,18,19,20,21

1" x 1/2"

25.4mm x 12.7mm

16,17,18,19,20,21

1-1/2" x 1-1/2"

38mm x 38mm

14,15,16,17,18,19

2" x 2"

50.8mm x 50.8mm

12,13,14,15,16

Other sizes as your demands.