Ping have a colour coding system for their golf clubs which covers the “lie” of the clubs.
That’s the angle at which the shaft leaves the head when it’s sitting on the ground.
A taller person tends to need upright clubs (e.g. blue) while a smaller person tends to need flat clubs (e.g. red).
So it depends on the height of the lady and the way she addresses the ball.
The shaft flex is very important also.
I’ve attached the colour codes from which you can see red is just the first on the flat scale (1 degree).
For a small lady, red mightn’t be enough.
What type of Ping irons are they? e.g. ‘G-5’ or something?