How old were you when...

[deleted20132]

I was 11-12y/o.

 

[Bootyman]

I'd say 12 or 13... I really don't recall it very clearly because I haven't given measurements too much of attention at that age...
I know for sure that I grew over the 17cm mark at the age of 16, I can remember it clearly...

 

[sparky12345]

Probably about 10 years old I may have been your size.