As you probably know, cobras meant much in ancient Egypt, and because of the link between Cleopatra and snakes, these necklaces most fits Cleopatra costumes and other Cleopatra-inspired women.
The necklaces have also a silver-colored chain that suites the pendant. As you notice, they were originally made for Halloween, however, they could be used as regular jewelry.
Designer/Manufacturer: Halloween Costumes (TM)
You can find out more, or buy this necklace at the manufacturer's original price by visiting their page on HalloweenCostumes (TM) here.