I voted "7-13", because my hair changed when I hit puberty-- although it wasn't really fully changed until I was more like 14 or 15. (What can I say... I was a late bloomer. ) 'Course, I was also a little bit curly as a toddler, as my avatar sort of shows. But I had straight hair with only a little bit of a body wave during the in-between years.
Previously Joy4ever.
Changed because the "number in place of a word" thing was bugging my no-longer-14-year-old self.