Do you think of your hair as shorter than it is, or longer? Or do you have a proper & accurate mental image of how long your hair looks?

Today I was walking around campus and I saw a girl with about CBL/nearing APL length hair and I though "wow I wish my hair were that long" ...but it is! It's past BSL now, but I still think of it at my shoulder. Another example, I had done two dutch braids in my hair one night to go to bed, and then braided my girlfriends hair as well. I asked her why her braids looked as long as mine, when her hair is at her shoulder. She completely disagreed but I really felt like mine barely hit my shoulder too... anyone else have stories?