This is a dedicated page. These are natural shell buttons (black butterfly flat). Also known as black butterfly dish. Size: 11.5mm The black butterfly shell has a unique rainbow color that changes depending on the light and viewing angle. The authentic texture is different from regular polyester buttons. Used in brand products, etc. ☆ Due to transportation, the buttons may occasionally break, so we include spares. #buttons #shell buttons #shell buttons #accessory parts #handmade