925 Silver Medieval Slavic Temple Rings. Historical Reenactment offers

Temple rings are the most characteristic part of Slavic medieval dress. They are so called because they were worn on the headband, near the temples of a woman offers or a girl. Most were made of base metals such as copper alloys or iron, though silver and even gold were occasionally used.
Reference: http://members.ozemail.com.au/~chrisandpeter/trmain/tr1main.html

These two are a replica of an archeological artifact from Slovenia dated 9th - 10th cendury A.D. They are made of sterling (925) silver and their dimensions are 3.9cm (1.53 inch) by 2.8cm (1.1 inch).