I'm 6 foot when I stand up straight, though because of a back condition I have I spend most of the time slouched, so cutting an inch or two of that is usually what I claim. (I've actually grown almost 2 inches in the last year or so.)
Funny thing is, when I do stand up straight I don't feel comfortable. Not physically, but psychologically - it makes me feel vulnerable and ill-at-ease. When I stand at my tallest I feel like my defences are weakened and I'm more open to danger. Perhaps ironic, as by standing taller I may actually be deterring more danger?