Hair like this you have rarely seen before!
We see at first that this woman's hair is collected and held at the back of her head in a bun.
Then, it is revealed that her hair is actually long, but it is only at the end that you will understand that her hair is really very long indeed --- much longer than you expected or even imagined at the beginning.
We do not have a precise measure of the length of her hair but we can imagine it, just as we can imagine the years that it took to arrive at such a result. A considerable effort, is it not?