How To Make Phiten Tornado How Do I Shrink / Shorten A Phiten Necklace?

How do I shrink / shorten a phiten necklace? - how to make phiten tornado

I have the Phiten range 22-inch book. I would've bought the 18, but it was like $ 31 and I was not willing to spend, so I asked if there is a way to make it smaller? Its kind of big on me. Okay, thank you: DI could use a lot of help.