I have seen some grey bailey button ugg boots on ebay which I want to get for my fiancee. She usually takes a size 6, and these I've seen are a UK 6.5 because the girl selling them got them from USA. What I want to know is would the 6.5 be ok for somebody that takes a size 6 generally. I've had a look on some websites that seem to be American and they dont seem to have UK size 6, just 5.5, 6.5, 7.5 etc.