Knitting a combination/cross-over of this pattern (EZ as pi Headphone Covers by Jocelyn Blair) and Headset Ear Covers by Kathie Popadin with some modifications of my own. You know me, I can rarely stick to a pattern unless I am test-knitting!

Using a drawstring instead of a hair elastic (which is what I assume that Jocelyn means by “headband” – a headband is hat diameter to me which would be much to huge). The only hair elastics that I have are a lot larger in diameter than my headphones.

What I actually did (both of the above patterns are free and so I am including my notes here):

1. Cast on 9 using Emily Ocker’s Circular Cast-on. I then transferred the stitches to one circ (80cm) and used magic loop but you could use DPNs as well.
2. Draw the cast-on tail tight and sew it through each of the 9 sts a couple of times. Leave on the inside and/or trim.
3. Knit 1 round.
4. Kfb all sts in round. (18 sts)
5. Knit 3 rounds.
6. Kfb all sts in round. (36 sts)
7. Knit 6 rounds.
8. Kfb all sts in round. (72 sts)
9. Knit 3 rounds.
10. K2tog all around. (36 sts)
11. Knit 1 round.
12. Cut a long tail and pass it through all sts using a darning needle.
13. Fit the cover to one side of your headphones and draw the tail tight. Sew the tail into the inside of the cover.
14. Repeat 1-13 for the second headphone cover.

Now I just need to cover the microphone boom end…