I just measured the distance from the outside edge of the keyboard of my "Le Capitaine" to the center of the row of keys: One full inch !! I have larger hands and it fits me wonderfully. I can easily reach the 1st (top) button ... I have to hit it for "Streets of Laredo". I do a mean Cajun version of it. As I mentioned before, the bass box is 2 3/16" wide.