Vintage Siam Niello Sterling Cobalt Blue Hinged Enamel Bangle Bracelet

  
The bracelet measures about 2 1/2 from side to side.... Measuring from where the hinges are.

The inner circumference measures about 7. The inner side of the bracelet does show some tarnish.

I've not attempted to clean it. I'll leave that up to you. I know some people like the tarnish on vintage items. Nielloware was produced for tourist in Thailand from the 30s through the 70s. It's used to give you a better idea of the size of the barrette.