I hand cut and polished this one of a kind, freeform shaped focal bead out of recycled bowling ball. Measurements are shown in the listing title. It is side drilled with a 2.5mm hole. CHAIN NOT INCLUDED. I have other colors as well. I literally saw up a bowling ball and use the colored reactive urethane that makes up the outside shell of the ball to make this. I grind, sand, drill, sand, sand, and polish this all by hand. VERY limited edition. I also work in fordite (built up car paint!), natural stone, and fossils. Feel free to check out all the items here in my DVHdesigns Store. Thanks for shopping DVHdesigns!