Made with thread specifically for friendship bracelets, so unlike embroidery thread, it's a stiff material. It also looks sturdy. Since it's handmade, if the end of the thread frays, you can melt it with a lighter and it will harden to fix it. Length when fully opened: 31.5cm Length when worn and tightened: 22cm Lengths are approximate. Adjustable. Color: Black系 (Black-based)