I just want to know how you attached each end - to the buds and to the jack - so that it won't slip off. Then I will be on my way to making some for myself!
I didn't do anything special, the rubbery texture of the earbuds and the tension of the stitches is enough to hold it in place. Also, when you weave in your ends, you can snug it up around the ends too. That might help a bit.