A question about tznius

This is probably gonna be a long one, so hang on.

I’m looking for sources about hilchos tznius, specifically about sources for specific areas which need to be covered on either men or women. The sources I am looking for must be from the the Tur or earlier. (If you know sources which are passed the Tur, I don’t care; you can feel free to comment them, but that’s not what I’m looking for.)

I am aware of the following: the notion of a woman covering her hair, the notion that contextually certain body parts being uncovered can be problematic (such as a woman uncovering her arms in a promiscuous way while spinning thread in public), the fact that certain body parts/voices are referred to as an erva to prohibit people from saying krias shema and possibly other things while these body parts are covered, and that certain colors are associated with pritzus. I’m aware that modesty is a virtue mentioned in nach, although that doesn’t seem to come with specific parameters. I’m aware that certain levels of modesty may be lauded by rabbis, going back to the gemara, but I’m not aware of a source which prescribes mandatory and specific parameters for tznius. I’m aware that many imply that the virtue of r yose (that he didn’t let the walls of his house see the parts of his body which touched the seams of his clothes) as being mandatory, and I’m not looking for that. I’ll edit this bn if anything else comes to mind, there may be other things which I’m not remembering.

Any help would be greatly appreciated.