Most Helpful Guy
I normally don't obsessive over that sort of thing, but since you asked...
The ideal height for a girl is 5'0 and the ideal hip size for that height is about 34-36 inches - so the ideal waist size for that hip size is about 20-22 inches.
Obviously, the taller a girl is, the wider her hips and waist would have to be in order to keep the same proportions.
Most Helpful Girl
my waist is 26" and I'm working to lose 3 inches, 23 is my ideal