This is a "5-1" Figaro chain: it has 5 short curb style links, then one long link. Each of the links has a filed style surface on the flat part of the link. Closed link construction provides a very strong chain for the size. The chain is made from brass that has been given a durable Antique Copper finish. Chain is about 3.2mm wide; the long links are 7.5mm long and each short link is about 3.5mm long. Sold by the foot.