THIS A YOUTH SIZE BUT IT CAN ALSO FIT WOMEN'S SHOES SIZE .Nike Flex Runner SE GS Black White Bright Crimson Kid Women Slip On.STLYE : CZ6528 001.1) YOUTH SIZE US 5Y, UK 4.5 , CM 23.5 , BR 35.5 AND EUR 37.5 WOMENS 6.52) YOUTH SIZE US 5.5Y, UK 5 , CM 24, BR36 , EUR38 AND WOMENS 7.3) YOUTH SIZE US 6Y, UK 5.5, CM24, BR 37 , EUR 38.5 AND WOMENS 7.5.