GAUGE / INCH / MILLIMETER CONVERSION CHART
Below is a conversion chart, for those of you using the metric system.

 

Gauge Millimeter
20 GA 0.8 mm
18 GA 1 mm
16 GA 1.2 mm
14 GA 1.6 mm
12 GA 2 mm
10 GA 2.4 mm
8 GA 3.2 mm
6 GA 4 mm
4 GA 5 mm
2 GA 6.5 mm
0 GA 8 mm
00 GA 10 mm
7/16" 11 mm
1/2" 12.5 mm
9/16" 14 mm
5/8" 16 mm
3/4" 19 mm
7/8" 22 mm
1" 25 mm