I've recently started working out at the gym and it helps me to listen to rousing music while I ride the stationary bike. Up until today I've just been shoving my headphones into a pocket but now they have a nifty little case thanks to the blog Dog Under My Desk & Erin Erickson's tutorial -
Circle Zip Earbud Pouch Tutorial
This project stitched up pretty quickly and painlessly and I plan on making a few more as gifts.
I would probably be a little more careful in putting in the zipper as one side but all in all not too bad.