This is a set of three hair ties made using fabric from minä perhonen (^^♪ Size: 38mm skip following day mermaid These are not collaboration products with minä perhonen. The rubber bands can be replaced if they become damaged. They can be used for various purposes, such as hair ties or book bands. The back is made of black felt. Thin fabrics are created after applying interfacing. Although they are made with care, please understand that they are handmade. Thank you. This is a set of three ^_^