About 3.5cm top to bottom, Width 2.4 cm
Weight 4.3 grams
The symbol has been used by Christians as a sign of the Trinity (Father, Son and Holy Spirit), especially since the Celtic Revival of the 19th century.
When modern designers began to display the triquetra as a stand-alone design, it recalled the three-leafed shamrock which was similarly offered as a Trinity symbol by Saint Patrick.