This is quite a belated reply, as several attempts at posting failed before.
Unfortunately, I either didn´t have a camera with me, or the situation would have been too embarrassing and creepy, shooting photos of strangers somewhere in the streets. Or there were friends and women with me who would have wondered about my deep interest in taking such a picture of a stranger.
In the summer of 1988, at an open-air festival in Cologne, Germany, I saw a young woman with ankle-length hair who wore it in a ponytail (or ponytail braid) to her knees and the rest of the length down, brushing against her calves as she moved. She was standing a few yards away from me all afternoon - wonderful torture. Even without that absolutely incredible mane, she would have been strikingly beautiful anyway. She had a female friend with her with waist-length hair, and I remember well the strange notion that in this immediate comparison her friend´s already impressive hair just looked disappointingly short.
I think that with my experience and self-confidence today, I would walk up to her and ask her if I could take a picture.
I did take pictures of an artist, Kricket Crowe (check spelling of her name?), in Vancouver, Canada, in 2006 who had calf-length hair then (and had had ankle length at some point before). But I would have to search the vaults of my hard disk for these pictures first. For many years she had a website that also showed pics of her hair, but I don´t know if that still exists.