Designer follows its own size guide, please refer to the below:
US 4 = UK 1.5/ EU 34.5 US 4.5 = UK 2/ EU 35 US 5 = UK 2.5/ EU 35.5 US 5.5 = UK 3/ EU 36 US 6 = UK 3.5/ EU 36.5 US 6.5 = UK 4/ EU 37 US 7 = UK 4.5/ EU 37.5 US 7.5 = UK 5/ EU 38 US 8 = UK 5.5/ EU 38.5 US 8.5 = UK 6/ EU 39 US 9 = UK 6.5/ EU 39.5 US 9.5 = UK 7/ EU 40 US 10 = UK 7.5/ EU 40.5 US 10.5 = UK 8/ EU 41