Ring Sizes/Chain Length (in inches)

Ring Sizes

Is there an international ring size chart?
Yes there are many online, like this one: http://www.ringsizes.co/sizingtool.pdf

How do I find my ring size?
You can use this nifty site: findmyringsize.com

Chain Lengths (in inches)

18" chain is just below your collarbone.
24" chain is at about chest level, just above your cleavage.
30" chain is just below boobies.