Skull Tattoo Designs?

Would anyone have some small skull designs they would care to share? Something that could go on an arm as part of a "tattoo" would be perfect. I've got tattoo roses mastered, but my skulls are not great. (I'm no good at painting people alive or dead!)

This is not a tattoo on a arm, but has a skull in it. Maybe you can use it and add flames or roses or hearts. I think others have much better examples, but because this one is very simple, it may be a good one to start with.