Hats, helmets, Napoleonic era

From Shako to colback and also women hats..

Head size in cm and US sizes:
53=65/8 // 54=63/4 // 54.9= 67/8 // 55.8=7
56.8 =71/8 // 57.7=71/4 // 58.7=73/3
59.6 =71/2 // 60.6=75/8 // 61.5=73/4 // 62.5= 77/8 // 63.5=8