For reference a penny coin is 19mm

  • OD: 19.5mm
  • ID: 12.5mm
  • 3.6mm-3.8mm THICK
  • 2.65mm OPENING

    • 2.25DWT (3.50 grams)

    RHODIUM PLATED
    That is a very thin layer of the most valuable precious metal over solid 10k gold.
    This has a brilliant shine like chrome or freshly polished sterling, vs a yellowish white gold.
    Almost every high end or designer white gold item is rhodium plated.