Works with any brooch with a vertical pin. Simply insert pin into tube and close brooch as you normally would. It's ready to hang on any chain or cord Will not damage your jewelry. Can accommodate any cord up to 5.5mm in diameter. Tube for pin is 12mm long and 2.4mm interior diameter. Loop is 15mm long and 3.5mm at widest point. 1 Silver Tone Pin Converter.