This is a pin badge that comes with each suit purchased from Re.muse, a high-end order suit brand popular on social media. It seems they are not sold separately. There are two pins. One (photos 2 and 3) is unused, and the other (photos 3 and 4) has been used once and is slightly darkened. Individual sales are also possible, so please comment if interested. * The box in the background of the photos is not included.