Thickness (mm)* I II III IV V VI VII VIII 5.86 6.52 7.43 8.55 5.49 6.66 7.52 8.62 4.94 4.98 5.01 5.12 2.30 2.30 2.31 2.34 Width at Mark 3 (mm) Mark III (5mm thickness) Initial Final 18.98 19.61 Mark VII (2.5mm thickness) Initial Final 18.94 20.72