Size Chart: CN36: US: US6.0", Ball Girth: 8.2", Foot Length: 9.2", Heel Height: 0.4" CN37: US: US6.5", Ball Girth: 8.4", Foot Length: 9.3", Heel Height: 0.4" CN38: US: US7", Ball Girth: 8.6", Foot Length: 9.4", Heel Height: 0.4" CN39: US: US7.5", Ball Girth: 8.7", Foot Length: 9.6", Heel Height: 0.4" CN40: US: US8", Ball Girth: 8.8", Foot Length: 9.8", Heel Height: 0.4" CN41: US: US8.5", Ball Girth: 9.0", Foot Length: 10.0", Heel Height: 0.4" CN42: US: US9.5", Ball Girth: 9.1", Foot Length: 10.2", Heel Height: 0.4" CN43: US: US10", Ball Girth: 9.3", Foot Length: 10.4", Heel Height: 0.4"