Opps Stainless Steel Magnetic Locket Necklace with Interchangeable Swiss Movement Watch Style A Important!! Because of the magnet fastener this necklace is not suitable for bearers of heart pacemakers!!! Locket Size:35mm; Movement Size: 29mm; O chain: Approximately 25.6"(60+5cm Extender). Available in 3 styles(You can find more styles in brand of "Opps" ). This locket watch neacklace can be interchanged with different plates by Opps to suit your style or preference. The locket watch necklace is a new combination which has always been the arch nemesis of the wrist watch because it's lighter, easier to carry around and you can accessorize it with nearly any outfit. Whichever one you pick, you're sure to grab some attention.