JUMP RINGS

Open Jump Rings are not soldered closed.  They generally come in light, medium or heavy.  The following will give you an idea of the different types.

Light - Usually .020-.025 inches diameter (.645mm to .511mm) in wire thickness or 22 - 24 gauge
Medium - Usually .030 inches (.813mm) which is about 20 gauge
Heavy - This can range from .035 inches - .050 inches (1.29mm - .912mm) and 16 - 19 gauge

A lot of this depends on the manufacturer.

SPLIT RINGS

These are just like key chain rings but smaller.  They are stronger than jump rings usually and are used heavily with charm bracelets as they are easier to take charms off and put new ones on than using jump rings.

(In Progress, more to come)
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