This is a recreation of a bronze Celtic ornament, or a part of one, from circa 600 A.C. found in Corinthia, Sanctuary of Hera at Perachora, Greece. The original, which has a diameter of 97 mm, is currently at the National Archaeological Museum, X 26803, in Athens. This is not a reproduction; the design was given symmetry and the missing parts were extrapolated.
Such type of jewelry was utilized as an adornment on a belt or abdominal area.
Medium: 51 mm (2.0")
Large: 67 mm (2.6")
Extra Large: 97 mm (3.8")
Another version without the ring for a bail can be found here: Celtic Ornament, Sanctuary of Hera, Greece