I'm 5'5" at around 65 inches. I've always been rather tall (though not always 5'5" I should probably add), and I was often mistaken for being older when I was in elementary school, though it decreased by a good amount in middle school, and now I'm more or less average at the end of my sophomore year. I doubt I'll be growing too much more, which I'm actually quite thankful for, because I find my current height comfy.
Ironically, my maternal grandfather was Irish, if I recall correctly. Not so sure about my paternal heritage.