Luv this idea for covering your earbud cords! It does help with tangling too. Used the same technique that was used to make these tribal necklaces . After endless searching for how to actually wrap it, I found this site honestlywtf.com . It has a great tutorial with pictures and directions. It wasnt hard, just a bit time consuming. I used the varigated purples (DMC thread),which used 2-3 skeins. I havent decided whether I want to do all the way up to my earbuds or not, so for now I just did the cord itself.
If you dont want to make your own these are available on Etsy.(top picture-green)