This is a lovely gift for a religious person, a perfect Easter, Confirmation, Baptism, Christening or First Communion gift. The fish is called an ICHTHUS or ICHTYS which is greek for "Jesus Christ, Son of God, Saviour". The fish are very dainty and are only 9mm x 5mm x 1.3mm, so can be worn discretely.
The fish are made from 16 gauge sterling silver. The ear post is also sterling silver.
I also have a matching necklace in large: https://www.etsy.com/SilverSculptor/listing/542658548/christian-fish-symbol-necklace-fish and small: https://www.etsy.com/SilverSculptor/listing/474516874/christian-fish-symbol-necklace-fish
All of my jewelry comes in a gift box, with a ribbon, so it's ready for gift giving to friends or family - or a little treat just for you!