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Wire Guage Table

Wire and Ring Inner Diameter Reference Table

The table below compares the 2 most popular wire gauge systems, decimal inches, fractions and metric for your convenience.
For more information on rings etc please go to Store & Product Info and look under Project and Product Selection Help
Note that there are 2 gauge systems: SWG and AWG.
To prevent confusion it may be best to refer to decimal inches or mm when comparing rings sizes - we post both with our rings for your convenience.
Millimeter Decimal Fraction The Ring Lord Conversion Info
(mm) Inch Inch Gauges *See Notes
0.20 0.0079 32 32 AWG
0.254 0.01 30 30 AWG
0.33 0.0126 28 28 AWG
0.404 0.0154 26 26 AWG
0.5 0.020 24 24 AWG
0.65 0.025 22 22 AWG
0.7 0.028 21 21 AWG
0.81 0.032 20 20 AWG
1 0.04 19 19 SWG = 18 AWG
1.22 0.048 18 18 SWG = 16 AWG
1.3 0.051 17  
1.6 0.063 1/16 16 16 SWG = 14 AWG
1.83 0.072 15  
2.0 0.080 14 14 SWG = 12 AWG
2.4 0.094 12 12 SWG = 10 AWG
3.2 0.125 1/8 10  

* People familiar with gauges will notice we use AWG for smaller wire and SWG for larger wire. We know it is confusing; unfortunately it was a convention we adopted years before we knew there was a problem. Please use decimal inches when confused.

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