Hats. Today, they are something we might consider wearing for a formal occasion, or to keep the sun off our heads. Back in the 1930s, however, no one would go anywhere without a hat. It simply wasn't done.
Here's a popular style from 1930.
And a variety of the decade's styles.
Most hats were small and off the face.
Hats were de rigueur for men as well.
And look at the 1930s prices!