Various styles of Raygun Gothic/ Atomic Era science fiction inspired earrings. 

both designs are made of gold tone metal, glass, and stone beads and connectors, arranged into shapes reminiscent of fantastic contraptions imagined by long-ago fiction writers.

One pair sort of looks like an ORRERY or astrolabe to me. that pair has hoops within hoops, and beads within beads, held in place with wire. post stud.

nearly 2.5" long, large hoop 1 1/8" diameter (30mm)

The other pair features a ROBOT and ASYMMETRIC design, with the left and right earrings being completely different. they look like delicately positioned toys, or perhaps futuristic lab equipment, but again are held rigidly in place with sturdy wire. French hook ear wires.

Robot earring 2" tall (not including hook), other one is slightly longer.

PLEASE NOTE THAT PRICES VARY 

DEPENDING ON WHICH STYLE YOU CHOOSE AT CHECKOUT.