Approximately 25cm in length, one size fits all. Used once. Color: Gray Materials: Silk, Nylon, Polyester Made in Japan It is described as a silk belly band, but there is no label, so please understand this. Compared to materials like those used in malls, it felt more substantial, so it's not too soft and fits snugly, keeping you warm without looking bulky. Fits sizes approximately S~L. I have a cat, so some short hairs may get in, but please be aware of this. Thank you.