Each of these choker style necklaces has one of my original flameworked beads, with metal (steel/nicklel, brass or copper) spacers & either glass or ceramic accent beads. The cord is waxed linen and is adjustable by moving knots together (for smaller) or apart from one another (for larger). Make sure to move each side separately, by holding the knotted piece and sliding it along the other one. The string is tough and will withstand daily wear for years.