Thickness (mm)* I II III IV V VI VII VIII 5.66 6.31 7.24 8.33 5.61 6.24 7.09 8.26 4.96 5.01 5.11 5.06 2.03 2.03 2.20 2.10 Width at Mark 3 (mm) Mark III (5mm thickness) Initial Final 19.43 19.81 Mark VII (2.5mm thickness) Initial Final 19.14 20.36