"Alright, enough with being a giantess," Sally grumbled, the fact she couldn't solve this issue initially frustrating her to no end. "I wish I was exactly five feet and nine inches in height."
At once, Sally's proportions returned to more human levels, and she enjoyed the extra inches she wished for herself. How could she have not seen the answer was to wish hyper-specifically?
"It all doesn't matter now, does it?" She asked herself, playfully admiring her reflection. Now she was a taller-than-average woman with a far-beyond-average intellect. And she had a magic mirror at her disposal. "I'm firmly in control of my fate; no more frivolous wishes."