Celtic knot with free moving ring in the middle made fun low cost plastic.
 
Dimensions: 4.08 x 2.59 x 5.13 cm (1.6 x 1.02 x 2.02 inches).
 
The prices are only marginally higher than what it costs me to get produced.
 
Please note the delivery time is currently about 3 weeks, as I do not have the pieces produced until they are ordered and they are produced in the U.S.