Vintage jeweled watch movement sets on custom silver plated over brass locket and it hangs on 18 inch surgical steel chain with lobster clasp. Measurement, Locket is about 1.4 inch (35mm) in length and 1.1 inch (27mm) in width on 18 inch chain. If you have a preferred length for the chain, please let me know in message to seller box and I will adjust it before shipping.