Size Chart:
US6: Ball Girth: 21", Foot Length: 23.0"
US6.5: Ball Girth: 21.35", Foot Length: 23.5"
US7: Ball Girth: 21.7", Foot Length: 24"
US8: Ball Girth: 22.05", Foot Length: 24.5"
US9: Ball Girth: 22.4", Foot Length: 25"
US9.5: Ball Girth: 22.75", Foot Length: 25.5"
US10.5: Ball Girth: 23.1", Foot Length: 26.0"
US11: Ball Girth: 23.45", Foot Length: 26.5"
This data was obtained from manually measuring the product, it may be off by 1-2 CM