This fine silver impression of the inside of a shell has a turquoise patina and is suspended on 24” 1.2mm sterling silver chain. Diameter of the spiral piece is approximately 5/8”.  The model is showing both the small spiral (on an 18" chain) and the medium spiral (on a 24" chain) as well as the dog tag necklace.  The medium spiral for the neck is approximately 1" in diameter.