This was the latest project I made in my silversmithing class. The chain is made from 14 & 16-gauge sterling silver wire. All links are soldered closed with every other link made of twisted wire. The toggle was also hand-made by soldering jump rings to a piece of square wire (see picture below).
Quick instructions: To twist your own wire…simply cut a long piece of wire (approximately 4 times more than the end length you want) -fold in half & attach looped end to a hook connected to a hand drill or electric drill & the other two ends to a vice. Twist until you get the look you want.