Apple’s iPhone 5 comes with EarPods. They are Apple’s new earbuds, shaped to fit the ear. Sugru is a soft, moldable silicone. It can be shaped, and allowed to dry to keep its form. That’s what one fellow did with his EarPods to get them to fit properly.
The problem for some may be that the EarPods are too small. That’s when you DIY the suckers.
Someone at Instructables did just hat. They have full instructions with how to fit the Sugru onto the EarPods and do it properly. You can check out those instructions here.