Thickness (mm)* I II III IV V VI VII VIII 5.51 6.23 7.13 8.29 5.42 5.94 6.79 8.04 4.93 5.00 5.03 5.10 2.63 2.68 2.64 2.60 Width at Mark 3 (mm) Mark III (5mm thickness) Initial Final 19.70 19.73 Mark VII (2.5mm thickness) Initial Final 19.20 20.33