This is a quickie tutorial I did last year for instructables.com, but i forgot to post it here. So, here it is.
The only measurements on it are the ones for the cuff portion and the length of 20g wire to start with. I did that because it's supposed to be a freeform ear cuff. This is just a suggested swirl pattern. Really, the only important part is getting the cuff portion correct so it fits. The rest is all up to your imagination.
If you use this tutorial, I do have one request. If you post it online, come back to this page and post a link to your work in the comments so we can all see what you made! Pretty please!
For those of you who aren't sure how to wear ear cuffs, here are instructions for how to put one on: