30 coils of  Stainless steel memory wire 0.62mm (0.025) wire. Finger ring size also useful for making wine glass charms. Coils 1.9 to 2.1cm diameter (0.75 to 0.84 inch).

The wire is very hard and springy, but can be worked with pliers. Finish with end caps or make loops with round nosed pliers.  
You may wish to try forming an addition loop in the centre of the wire to add charms.

This is the smallest of the three sizes as shown in the photo.