Wheel Question on width measurements

[kfs-4runner]

Real quick questions about wheels. When a wheel is said to be 7 inches or 8 inches wide, where is the measurement made from? Outside edges or inside the between the edges?

 

[spartacus]

Real quick questions about wheels. When a wheel is said to be 7 inches or 8 inches wide, where is the measurement made from? Outside edges or inside the between the edges?

It's the inner part where the tire sits on the wheel. From bead to bead.