The little fish on this dainty chain is only an inch long and made of gold-filled material. Gold-filled wire and chain is made from a more sturdy material and covered in a layer of 14K gold that is significantly thicker than if it were merely plated. Overall, the necklace is very minimalistic. Standard necklace length is 18 inches long, but you can choose a slightly shorter or longer chain. The clasp is a tiny lobster claw a half inch long. The Ichthys has been used by Christians to make a statement of faith for some time. The word Ichthys stands for Jesus Christ Son of God Savior.