Pleated, black detachable sleeves! Size: One size, length is approximately 19.5cm. Perfect for adding an accent to jackets, cardigans, and sweatshirts in the coming season. I thought they were very cute and bought them at NYUNYU, a shop in Korea that sells cute miscellaneous goods. I'm selling them because I haven't had a chance to use them. Of course, they are unused! I apologize, but I am not accepting price negotiations.