The Sirena necklace is made with a cowrie shell I found in Nosara, Costa Rica. It is encased with sterling silver and has a beautiful smooth feel to it. Designed to be a classic heirloom piece which can be worn with a bikini and bare feet or dressed up.The hoop is designed so that no additional findings need to be added and therefore it's very secure on the necklace. The necklace is an 18” sterling silver snake chain. If you want a slightly longer or shorter necklace please contact me for options. These are all natural shells so are all slightly different in size and colour, please contact me if you want exact dimensions or to choose your pendant.