You know the problem, sometimes your pegboard box is only half full, you could put a second sort of thing in, but you don't want to mix things. I got a VonHaus Pegboard and of course I had that problem... So first of all I made a separator for the small sized boxes. After that also for the middle and big sized boxes. All separators are 80 mm wide and 30.8 mm high. Of course the vary in length by 80 mm , 130 mm and 175 mm.