Based on other reviews, I chose size 6, which is my usual women's size. When the package arrived it was marked "39", which is European size. My EU size is 36 so I can assume the size listed was US for men. When I clicked on my order the size listed was 6/39 so at first I blamed myself for being too hasty but then went back to the listing and there was no European size listed anywhere. They were pretty cheap so I just keep them and tie them tighter and/or try to shrink them in the wash instead of putting them back in. They appear to be of good quality. I can't say anything about comfort as they are too big.
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