items:

-some polymer clay (a small pack is like $2, a big brick is like $4-6)
-Jewelers Millimeter Gauge Ruler (i stole mine, they can be pretty expensive)
-oven..obviiiiousssllyyy

If you want you can pick up some clay glaze to for a shiny finishing touch. I assume you know what gauges are, some plugs have flared edges so they don't fall outta yr lobes. This can be a little cumbersome with clay, but it's pretty simple....just take a chunk of clay and roll it so it looks like a little cylinder and using your fingertips squeeze the middle gently, rolling back n forth till it's even. Once it's all sweet and perfect, put it in the oven at 275 degrees F, for like 10-15 minutes. Keep an eye on it and pop in from time to time taking them out to check if they're burning (it happened to the first pair i made). Flipping them once should help you out. Wear them, show them off, give em away to a lover...tell em some chic named chloe on the interweb helped you make em. lol

^_^