Metric Conversion Table

U.S. dimensions

METRIC equivalent

1/16 inch  

2 mm

1/8 inch

3 mm

3/16 inch

5 mm

¼ inch

6 mm

3/8 inch

9 mm

½ inch

1.3 cm

¾ inch

1.9 cm

1 inch

2.5 cm

1 ½ inches

4 cm

2 inches

5 cm

3 inches

8 cm

4 inches

10 cm

5 inches

13 cm

9 inches

23 cm

11 inches

28 cm

13 inches

33 cm