I'm 5'9 and she was shorter than me in heels, I thinkIn heels she is taller than that.
Maybe I'm taller than I think? I haven't measured myself in years - my mistake! I don't really understand those measurements anyway.
Oh, it's quite simple, the measurement is taken in bare feet. What I mean is, you must have been wearing something on your feet when out to meet Katy, too, your own heels add to your height. But Katy isn't shorter than 5'9" in her heels, they make her over that.