I am a girl, buy shoes wear 39 yards, in the UK to buy shoes should be what yardage?

5 1/2 or 6, their shoe size and our seemingly can not be exactly one-to-one correspondence, I wear 37 or 38 in China, buy shoes in the UK 4 1/2 or 5 can wear ...... you can go on the official website of Clarks, for example, there is size and fit guide, European size39 The corresponding is uk size 5 1/2,39 1/2 corresponds to 6

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