This whelk shell has a pleasing texture and is 12mm long (not including jump rings). Available in silver or 9ct yellow gold. In silver it comes on a 16, 18, or 20 inch box chain. In 9ct yellow gold it comes on a 16, 18, or 20 inch curb chain. As a size guide, the model is a size 14 and is wearing an 18 inch chain. Also available as a charm on its own - see here: Whelk Shell Charm - Silver – Jewellery by Lucy Campbell
