The United States was at war for the first half of the 1940s.
Much of the clothing from this time reflects the way Americans lived:
Practical, frugal and hardworking.

1940s Simplicity dress patters

This pattern is a great example of what working women during World War II may have worn.
Many of these women would have worked in factories making war materials.
I imagine Rosie the Riveter being comfortable in wearing either one of these dresses. Can you?