Sally Jupiter Costume (Silk Spectre I) from Watchmen

Step 16 Earrings!

Take your round gold and black buttons and remove the loop (shank) from the back.  (This can be done with wire cutters, or even just pliers if you turn them at the correct angle and your buttons are plastic.)  If your buttons are plastic, file down the raw edges left from this to smooth them.

I could not find earring bases anywhere in town, pierced or clip-ons, so I improvised and bought a pair of cheap clip-on earrings and removed the other parts, leaving the clip on and the base.  

Glue the buttons to the earring bases and allow to dry.  Use a serious glue, or they will fall apart easily, allow to thoroughly dry before attempting to open or close and wear if you used a clip-on.  You may be able to wear them when the glue is still tacky if you are using pierced stud bases.