Thickness (mm)* I II III IV V VI VII VIII 5.74 6.42 7.29 8.42 5.77 6.49 7.52 8.55 4.79 4.82 5.05 4.90 2.90 2.62 2.55 2.76 Width at Mark 3 (mm) Mark III (5mm thickness) Initial Final 19.02 19.68 Mark VII (2.5mm thickness) Initial Final 19.01 20.94