These are hoop earrings with a lotus flower. This flower, in Buddhism, symbolizes physical and spiritual purity.
 
They are made of brass: a copper and zinc alloy.
 
It does not contain nickel, material that usually causes allergies. In case you really like earrings but only tolerate silver and gold, there is a trick that can help you:
use a transparent nail polish on the stick that goes through the ear and this way you will isolate the metal from your skin.
 
Dimensions: 2.5x2.3cm