Thickness (mm)* I II III IV V VI VII VIII 5.61 6.23 7.20 8.43 5.60 6.23 7.17 8.30 5.12 5.15 5.24 5.36 2.54 2.69 2.52 2.66 Width at Mark 3 (mm) Mark III (5mm thickness) Initial Final 19.19 19.81 Mark VII (2.5mm thickness) Initial Final 19.17 20.44