This is an official, authentic item purchased at the CDJ2526 merchandise booth. It's a very rare item that sold out immediately at the venue. *This item is also sold out on the online store. *Please note that since the item is unopened, we cannot accept returns for defects. Thank you. Product Name: Pikapi Bangle Light Size (quoted from the official website): Diameter 7.7 x Width 2.1 Included: Coin battery CR1620 x 2 Color: Blue Ano-chan Bangle