Not really a “costume movie” per se but as it’s period, here it is. This movie is an attempt to narrate and understand he story of two French chambermaid sisters who murdered their employers in 1930s France. The crime was hugely shocking at the time. Set in the 1930s, with nice average person wear and some good Marcel waves. Warning: not only is it gory (not in a horror movie sort of way), but there are also incestual/lesbian elements. Sorry if that’s a spoiler, but if that sort of thing really bothers you, skip it altogether. This version really captures the mindset of the sisters and the horror of the crime. See it instead of the English-language 1994 version. In French.