Size Chart:

US6: EUR36: Ball-of-Foot Circumference: 8.3", Foot Length: 9.1"

US6.5: EUR37: Ball-of-Foot Circumference: 8.5", Foot Length: 9.3"

US7.5: EUR38: Ball-of-Foot Circumference: 8.7", Foot Length: 9.5"

US8: EUR39: Ball-of-Foot Circumference: 8.8", Foot Length: 9.8"

US9: EUR40: Ball-of-Foot Circumference: 9.0", Foot Length: 10.0"

US9.5: EUR41: Ball-of-Foot Circumference: 9.1", Foot Length: 10.2"

US10.5: EUR42: Ball-of-Foot Circumference: 9.3", Foot Length: 10.5"

US11: EUR43: Ball-of-Foot Circumference: 9.4", Foot Length: 10.7"

US12: EUR44: Ball-of-Foot Circumference: 9.6", Foot Length: 10.9"

US12.5: EUR45: Ball-of-Foot Circumference: 9.8", Foot Length: 11.2"

US13: EUR46: Ball-of-Foot Circumference: 9.9", Foot Length: 11.4"