Whats the average size of an arc electrode? Whats the normal size of an arc welder electrode?

Whats the normal size of an arc welder electrode?
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Answers:    For a small home welder, 3/32 or even 1/16". For most commercial work it is 1/8". The bigger the rod, the higher amperage the domestic device needs to be. Railroad cars use 1/4" rods. Many businesses are switching to MIG wire welders.
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There is no "normal" size.
The size really depends on the type and bulk of metal, position and heat you`re using.
If you`re wondering which size is most commonly used, I would have to guess 1/8th inch!