Won't lie, we are obsessed by these.  
There are soooooo many ways to use these. The gentle 'tinkling' sound, the scrunchy texture & cool to touch stainless steel make for an awesome fidget and sensory tool.  Lay them flat on a surface and using your fingers move in a range of directions to form mesmerising patterns & movement. S crunch into a ball or drape over the arm and 'pick' or roll/rub your hand back and forth.  

It comes with 3 sizes all in the one one carry tin. The various sizes allow flexible use - keyring size through to a more substantial over arm size.  

Smallest is 7xm x 7 cm Approx 3gm
Mid size 14 cm x 14 cm Approx 10gm
Largest 21cm x 21cm Approx 21gm
Helpful tool for 'picking' replacement, the largest size has a lovely weight to it.  
Each have a split ring attached so that you can attach to a bag, keyring or wear over the finger to secure it while using. 
Materials: Stainless Steel.
Not suitable for 3 years and under due to small parts.