Headbands used to be an integral part of the sewing process, that tied off stitches at the top of a book block; and are now an excellent garnish to make your hardcover look complete.
BNB currently offers headbands in 10 combinations (subject to availability):
Black & White, Black & Gold, Blue & Gold, Blue & White, Burgundy & Gold, Green & Gold, Green & White, Red & Gold, Red & White, White.