US Sizing EU Sizing CM INCHES 2 17 12.065 4.75 3 18.5 12.7 5 4 20 13.462 5.3 5 21 14.224 5.6 6 22.5 14.986 5.9 7 23.5 16.002 6.3 8 25 17.145 6.75 9 26 17.78 7 10 27.5 18.796 7.4 11 28.5 19.685 7.75 12 30 20.574 8.1 13 31 21.59 8.5 Junior 1 32.5 22.225 8.75