Blaise + Cosmo size guide - EU CM (Insole) US UK 35 23.7 3 2 36 24.4 4 3 37 25 4.5 3.5 38 25.7 5.5 4.5 39 26.4 6 5 40 27 7 6 41 27.7 8 7 42 28.4 8.5 7.5