6' and using 120's for regular skiing, when I go up hill I bring the adjustable and run them around 123-125 depending on how I feel.
I recently tried to change up pole length just to try something new and see what would happen.. moving up to about 122 felt pretty good and I could have stayed there, I've just been using the same set of Goode poles for 15ish years and changing from that felt weird.