It is said that wearing this will bring good luck (it's a legend). Perhaps this is the only one in the world. Please wear it when you go to that place. Not recommended for work when purchased online (except for those who work at JRA). The necklace has an adjuster so you can adjust the length. The bracelet is huge. It might even fit sumo wrestlers or professional wrestlers. For me, it fits perfectly on my elbow. Material: Aluminum