Thickness (mm)* I II III IV V VI VII VIII 5.55 6.45 7.41 8.48 5.65 6.47 7.32 8.37 5.13 5.05 5.06 5.02 2.57 2.55 2.57 2.60 Width at Mark 3 (mm) Mark III (5mm thickness) Initial Final 19.18 19.88 Mark VII (2.5mm thickness) Initial Final 19.18 19.83