The story of Cheaper by the Dozen ends in 1924. We'll investigate this in several contexts. But FIRST, we'll look at FASHION, since it plays an important role in the play.
To begin, 1924 sets us just after the end of WWI. (The Treaty of Versailles was signed in 1919. However, the signing was followed by the Turkish Independence War, and a final peace treaty was signed in 1923.)
That said, what does that mean for fashion?

Here we see a goodbye kiss during the war.

A sewing circle for the war... Dress was very conservative, as you can see. Please notice the long skirts, and, if you can make them out, the heavy wool stockings.

THEN, came the FLAPPERS, celebrating the end of the war, and the coming of jazz!

Quite a change from the wartime dress, right? There are many wonderful pictures of flappers available, and I encourage you to look for them to get a sense of what the 1920s looked like. I've selected this one though, because of the ROLLED SILK STOCKINGS.

Legs were on parade for the first time in America, and so, wool stockings were out, and silk stockings were in. Scandelous!

Here are some ads for silk stockings in the 1920s.

The girls of the Gilbreth house want them desperately!

But their father says absolutely not.

They are the only girls in school who still have to wear wool stockings, and believe that's why they're never asked out on dates.

What would the equivalent be today?