I need help finding plastic jump rings that are at most 4mm diameter across. I can find rubber ones just fine but I would prefer plastic. Have you ever seen any in wholesale?
I have never seen plastic jump rings. I have see necklaces made from plastic rings. You may have to buy a necklace and take it apart. However, that said, because of the material, you may find the ring may break when you go to twist them open, plastic is not a malleable material..