These charms are made from a zinc alloy metal which is lead and nickel free. Measurements: 12mm x 37mm. Simply strung onto a silver dainty cable chain. Please use menu for length. With lobster claw clasp. All of my jewelry is made by me.Thank you for shopping hand made and Thanks for visiting! Let's visit some more on Facebook, I'd love to be your friend! I actually hand cut and make this with parts I put on and everything by hand this is not mass produced and resold. I hand make this.