I don't know anymore. I feel like they changed the shoe sizes or something. All the shoes I own are between 8 1/2 and 9 US womens, and they fit fine. Some of them I have only worn once, but they still fit fine. But when I go to the store and try on shoes the same size, they are way too small. But any size bigger is too big.
22, Female, 5"7, size 10 1/2...kinda big, not enough for a Peggy Hill situation but sometimes there isn't really cute shoes in my size, and every other girl's shoes look pretty small compared to mine hehe.
I'm somewhere between a UK 5 and 5.5. It makes finding the perfect fit very annoying, because not many places do half sizes. More often than not a size 6 is just way too big, or a 5 is simply too tight to be comfortable after walking for a while. I guess it depends on the company and shoe, because my current boots are a UK 5 and they fit perfectly.