Thickness (mm)* I II III IV V VI VII VIII 5.58 6.22 7.06 8.21 5.93 6.34 7.16 9.35 4.68 4.85 4.68 4.89 2.79 2.72 2.76 2.76 Width at Mark 3 (mm) Mark III (5mm thickness) Initial Final 19.05 19.87 Mark VII (2.5mm thickness) Initial Final 19.20 20.39