Hello, below is the EU size, insole length and recommended age range information for our Igor brand shoes: 👣 Children's Sizes: 22 = 13. 0 cm → 1.5 – 2 years 23 = 13. 7 cm → 1.5 – 2 years 24 = 14. 4 cm → 3 years 25 = 15. 1 cm → 3 years 26 = 15. 8 cm → 4 years 27 = 16. 5 cm → 4 years 28 = 17. 2 cm → 5 years 29 = 17. 9 cm → 5 years 30 = 18. 6 cm → 6 years 31 = 19. 3 cm → 7 years 32 = 20. 0 cm → 8 years 33 = 20. 7 cm → 9 years 34 = 21. 4 cm → 10 years 35 = 22. 1 cm → 11 years oldYou can easily determine the most suitable number by measuring your foot length in cm and comparing it with the table. If you wish, if you share your child's foot size, I will gladly assist you in finding the most suitable size. Respects.