My wife has a friend that is about 4" taller than her. Recently she wanted to ride one of my wife's bikes but we weren't sure if it would fit and assumed we'd need to raise the saddle. We didn't. As it turns out the friend has a very long torso. "Women's" specific bikes assume that women have shorter torso's and the bikes are often fitted with a "woman's" saddle. Be sure there is an actual need for a "woman's" bike because many women have no particular need for getting a woman's model. If she has a short torso and prefers the colors in a men's bike, just get the right saddle and smile. Her height may limit selection, of course, but that's a different issue.