4.5Y & 5.5Y are 23.5 CM and 24 CM narrow lasts respectively

Generally speaking, you can choose this size if your feet are not wide, or if your shoes are not more covering or have narrow toes.

5Y & 6Y are 23.5 CM and 24 CM wide lasts respectively

Generally speaking, you can choose this size if you have a wider foot plate or a shoe with a more enveloping shoe and a narrow toe box.

Size:
3.5Y/22.5CM [EUR 35.5] = Female US5, 4Y/23CM=[EUR 36]= Female US5.5, 4.5Y/23.5CM [EUR 36.5]=Female US6, 5Y/23.5CM [EUR 37.5] = Female US6.5, 5.5Y/24CM [EUR 38]= Female US7, 6Y/24CM [EUR 38.5] = Female US7.5, 6.5Y/24.5CM [EUR 39] = Female US8, 7Y/25CM [EUR 40] = Female US8.5 NIKE AIR JORDAN 1 LOW OG BLACK TOE (WOMEN'S) [CZ0858-106]