6-Pack Mirror Screen Protector for Apple iPod Touch 4th Gen
We bought these for my son and my niece.  They fit the iPod touch 4G well, but don't seem to stick that great.  We put one on my niece's and it went on better than my son's.  We went through three of them on my son's iPod and finally just gave up.  Couldn't get it to stick very well.  I have a different type on my iPod that I've had on it for a year, I don't think these will last that long.  The finish on them turns your iPod into a mirror when it's off, so that's a nice feature.  Just wish they would stick