Iron on the interlining to the wrong side of one piece of fabric. Place this piece back to back with the other piece of fabric, right sides facing out, wrong sides facing together.
Using a sewing machine (or if you are really good at hand stitching close together stitches, start sewing what ever shape you like, connecting back to the beginning so you have a closed shape. If you are using a large piece of fabric, do this several times so you can cut several sets out to make more than one pair of earrings.
Cut away the shapes from your fabric (which is now double sided- pattern on both sides- two pieces of fabric together with the interlining in the middle)... I cut as close as I could to the stitching, roughly 1/8"...
At the edge where you would like to place the ear hooks. Poke a nice clean hole using an awl or a large needle through the layers of fabric, to stick the ear hooks through. If you want to get fancy, I have seen teeny tiny grommets that you could also use to make them more polished looking instead of just punching a hole for the ear hooks to go through.