36 DIVIDER SIZES Heights HEIGHTS: 4′-0″, 5′-0″, 6′-0″, 6′-8″, 7′-4″, 8′-0″ Lengths LENGTHS: 5′-9″, 9′-5″, 13′-1″. 16′-9″, 20′-5″, 24′-1″ Sizes 6 HEIGHTS x 6 LENTGHS = 36 SIZES!