5mm thick Eco sterling silver 925 choker necklace with hammered texture.
 
This forged piece of solid precious silver is heavy weight and strong.  (Also available in solid brass) 
 
Simply pull the ends wider to open and close around your neck to your chosen size, either tight fit or with a larger opening. (One size fits all) 
 
Hallmarked in the london essay office so please allow 2-3 weeks making time.