Some questions about wheels and tires.

On Wheels
Example: 14 by 6
I understand that the diameter of the wheel is 14 inches. But is the "6" the width of the wheel, and is this measured in inches?

On Tires
Example: 195/60/14
I understand that the the tire is for a 14 inch wheel. I also understand that the width, and the tirewall of the tire is 195 and 60 respectively. But is the "195" and "60" measured in mm?