Plastic
These finger sizers help you figure out what your ring size is.
When you don't want to ( or can't) go into a jewelry store to find your own size, these are conveniently right there with you, in the comfort of your own home.
This set will measure sizes 2-13. Half sizes included.
"Make sure it goes on easy, but comes off with a bit of a tug".
Then happy shopping!
-Andrew