Now you may be wondering what sort of fashion inspiration I can get out of this film being that it is a) set in a time period I don't care for and b) a Western, which is something I ordinarily can't stand. But a while ago, I read on a historical costuming blog (sorry, can't remember which one) that often times hair, makeup and even costumes (to some extent) reflect the values of the period the movie was made in, rather than set in, which makes sense as beauty standards change over time and many practices would be ridiculous to modern viewers. So being that this film is from 1955, we can glean some tidbits of 50s fabulousness.
Gingham is always adorable! I could totally see this as a 50s day dress just shorter and with a few more crinolines!