Commercially made sterling silver, 14k gold fill, and 14k rose gold fill chains, the same I use in my own jewelry. The chains are a nice lightweight chain -- significant, but not heavy.
Sterling: 2.0mm wide rolo chain with a lobster clasp
14k yellow gold fill: 1.7mm flat oval cable chain with a spring ring
14k rose gold fill: 1.1mm oval cable chain with a lobster clasp