EU US UK AU Foot Length Foot Girth 37 5.5 5 5 23 22 38 6 5.5 5.5 23.5 22.5 39 6.5~7 6~6.5 6 24~24.5 23 40 7.5 7 7 25 23.5 41 8 7.5 8 25.5 24 42 8.5 8 9 26 24.5 43 9~9.5 8.5~9 10 26.5~27 25 44 10 9.5 11 27 25.5 45 10.5~11 10~10.5 12 27.5 26 46 11.5 11 13 28 26.5 47 12~12.5 12 14 28.5 27 *Measurements shown in the Size Conversion Chart refer to body measurements.