These handy little gadgets convert Pins into Pendants. They slip over the pin stem and are easily moved from one pin to another. Pin stems can be up to about .04 inches (1mm) in diameter. The bail accommodates chains up to 2.7 mm. This one is .925 Sterling Silver and 31mm (~1 1/4") long. Gold Filled converters are available in 12mm, 19mm, and 32mm. Sterling Silver converters are available in 15mm, 22mm, and 31mm. These converters will probably not fit over the clasp of an omega chain. However, if you have a rigid neck wire without a clasp, this very well may fit, creating a "slide" from your pin. Neckwires that are approximately 3mm wide and 2mm thick will fit though the bail. Need a larger bail? See Pin to Pearls converters. The chain is not included, but I do have a selection of chains if you need one. Please see this special shipping note when buying converters and chains.