This necklace features a 1966 USSR stamp called Demonstration on Red Square in Moscow from the society and technology series. The image was taken from real, used, vintage postage stamps and may have post office cancellation marks. Size of the pendant is 20mm and the chain is 18 inches long in a matching antique bronze finish with a lobster clasp. Pendants are water resistant but not waterproof, I recommend removing before showering, bathing or swimming.