Ball Width

The ball with is the measurement across the bottom of the shoe last.  The Ball width is measured across the bottom of  the shoe last from the lateral ball point to the medial ball point.  When measuring a last you need to know the ball width. The ball girth of a last typically grades at a rate of 1/3 of the Ball girth grade.  Teh Ball Girth grade is  6.35mm per size so the ball width will grade about 2mm per size.