This item can be used for various heko obi and hanhaba obi butterfly knots and other arrangements. Made with stretchy lace. The lace covers the elastic, so it's designed to be discreet. It won't add bulk even when tucked inside the obi. Russell Lace (Black) Nylon, Polyurethane Overall dimensions: Width 13 cm x approx. 170 cm Inner elastic: Black, Width 2.5 cm x approx. 20 cm Please allow for slight variations. This is a handmade item. Please understand and consider this before purchasing. Thank you very much.