Hello, the EU size and foot length (cm) measurements for our Skechers brand shoes are as follows: � � Child / Youth Measurements: 27 = 17cm 28 = 17.5cm 29 = 18cm 30 = 18.5cm 31 = 19cm 32 = 20cm 33 = 20.5cm 34 = 21.5cm 35 = 22cm � � Adult / Unisex Measurements: 35 = 22. 5 cm 36 = 23 cm 37 = 23. 5 cm 38 = 24 cm 39 = 25 cm 40 = 25. 5 cm 41 = 26 cm 42 = 27 cm 43 = 27. 5 cm 44 = 28 cm 45 = 29 cm 46 = 30 cm 47 = 31 cm You can easily choose the most suitable size by measuring your foot length in cm and comparing it. If you wish, I can share your foot size and recommend the most suitable size for you. Respects.