This is a new Emon-nuki (neckline adjuster) from Shizuka Naganuma. Emon-nuki is an item used to prevent the neckline from collapsing when wearing a kimono, and it's an accessory for beautifully adjusting the kimono collar. You sew it onto the undergarment (Nagajuban) and pull the collar through it. If you need more than 4, please feel free to contact me!