Size 6 = Diameter 16 mm = perimeter 50.24mm
Size 7 = Diameter 17 mm = perimeter 53.38mm
Size 8 = Diameter 18 mm = perimeter 56.52mm
Size 9 = Diameter 19 mm = perimeter 59.66mm
Size 10 = Diameter 20 mm = perimeter 62.80mm
Size 11 = Diameter 21 mm = perimeter 65.08mm
Size 12 = Diameter 22 mm = perimeter 69.08mm
Size 13 = Diameter 23 mm = perimeter 72.36mm
Size 14 = Diameter 24 mm = perimeter 75.36mm



