Various chains. The long, heavy one hasn't been untangled, so I'm not sure if it's one piece, but it's over 16m. There are also chains with and without clasps. The ruler on the side is 30cm. When using a pendant, some may not fit if the bail is small. Search Keywords: Bronze, Copper, Gold Color, Silver Color, Gold Plated, Brass, Stainless Steel, Nickel Silver, Handmade, Craft