This onyx in bronze matrix is wrapped in 22 gauge solid sterling silver wire. It measures approximately 1" at the widest point and approximately 2" in length from top to bottom.
 
This pendant will come on a 27" adjustable black satin cord unless otherwise specified. I can place it on a 16" or 18" inch sterling silver chain as well for an additional $10 which can be purchased separately. Please find the link for the chains below.
 
https://www.poisonivy-designs.com/product-page/sterling-silver-chain