This buckle was extremely popular amongst the Kievan rus from the 10th to the 13th centuries. 

The spade shaped buckle comes in a variety of sizes. This one is 4.5 cm long and intended as a belt buckle or purse closure.
It is also available in gold.

Measurements:
Spade L=  4.5 cm, W= 4 cm, Bar length= 1.7 cm