Corvax, and Eldritch, I think your points are important. I feel uneasy about discussing the attire of "other cultures" outside the context of the attire of our "mainstream culture," because I think there are "rules," but because they are part of the dominant culture, we just take these for granted as "normal." Also, I'm still not entirely clear where variations within "British" culture fall. Are kilts "mainstream" because they are common, acceptable attire for Scottish men in Scotland, or is that considered an "other culture" in the context of the UK as a while.
The nub here I think is how do we determine whether what women wear in any culture is something that is genuinely and freely chosen and not something they adopt as the result of direct pressure (e.g. husband or boyfriend, legal requirements, religious diktat, etc.) or indirect pressure (e.g. peer pressure, negative consequences of not conforming, 24/7 marketing, etc.)
I think more often, we question whether the woman wearing the Burberry hijab, the African head wrap, the Sephardic Jewish scarf or the Greek widow's black outfit is being "forced" to do this by her husband/father/son rather than accepting that this could be an informed choice of attire on her part.
Similarly, we may be more likely to accept the word of a young woman in 5 inch heels, daisy duke shorts and a tight, low cut blouse when she says she feels confident and empowered when she dresses this way - that it's her choice.
It gets complicated when we start to unpick the components of "choice" and the degree to which women in any culture actually have free, fully informed choice and agency within their lives.
I'm reminded of this cartoon Everything Covered/Nothing Covered But Her Eyes.