Proper Dress for Women
Rabbi Zalman Weiss gives a series of lectures to Bney Noach (Noahides), those who follow the universal laws of mankind as given to Adam HaRishon and Noach, the righteous, who wish to convert to Judaism. One of them is about the proper dress codes for women. Rabbi Weiss covered some of the halachos of Das Moshe (Torah requirement) and some of Das Yehudis and explains the difference. Rabbi Weiss also touches on the subject of Yichud, which is all part of maintaining modesty among Am Yisrael.
To learn more indepth of the halachos of Tznius, we recommend these links: