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Therefore, if you wore a size 8 in a men's shoe, your equivalent women's shoe size is a 10.
However, while most people have consistent sizes across types of shoes, sometimes depending on the style of shoe and where it's manufactured, you may have to get one that's larger. I noted that I had to go a size larger for shoes made in Brazil, for example, while others were fairly true to my actual shoe size.
So word to the wise is try them on first before you buy them to make sure they're comfortable and they fit.