I think the perfect length is, number one whatever is most comfortable for you. Me personally, I would love any length from lower back on down. But Anya, you my sweetheart are no average woman. Your hair is like a national monument for me. I'd love to see it anywhere between knee length to mid thigh length. It gets thicker the shorter it is. I could only dream of what it feels like. Other girls out there, that have okay hair, but you really know how to take care of it and it shows. No matter what though, you'll still be our little princess