One of our most popular necklace, now with a smaller pendant! Fully adjustable from 16-18 inches on a double sterling chain. This is a great necklace for layering two or more! Official Coca-Cola product, glass is approx one inch in diameter. Patented. All Smartglass Jewelry purchases come beautifully boxed with an artist card, handcrafted and recycled story, and bottle key card included.