Shure doesn't skimp on the extras, even though these aren't their top-of-the-line earphones. My set came with a very handy zippered carrying case as well as a number of different sleeves to ensure a good fit for many different ear shapes and sizes (see Figure 2).
Figure 2 Zip case and extra sleeves.
Having multiple sleeves can also reduce the "yuck" factor if you'll be sharing these with your spouse or...well, I don't think I'd share something that gets stuck in my ear with anyone else but my wife, even if we did use different sleeves.
The E3cs also come with a cable that's five feet in length, which is something of a mixed blessing. While my original iPod earbuds are often yanked out of my ears when I turn my head too far to one side (especially at the gym), a five-foot cable never has that problem. A problem it does have, however, is getting caught on just about anything you walk by: doorknobs, children, exercise machines with bars sticking out of them, etc. They're all going to snag you if you're not careful. In the end, I appreciated having a longer cord than Apple provided, but I wrapped the Shure cord around my arm a few times to keep the extra slack under control. A four-foot length would have been easier to manage.