Foot Length. 38.5 5.5 6Y 24 240 24. 37.5 4.5 5Y 23.5 235 23.5. 36 3.5 4Y 23 230 23. 35 2.5 3Y 22 220 22. 33.5 1.5 2Y 21 210 21. 32 13.5 1Y 20 200 20.