Someone asked me the other day why it's so hard to find vintage clothes in larger sizes? I thought about it for a while and here is my humble theory.
The average woman in general wasn't very slim in the 40's and 50's. No, she had hips and curves but she also used a whole other range of undergarments that helped shaping the body. "5 pounds of underwear" as Jennifer puts it in the movie "Welcome to Pleasantville".
The clothes in smaller sizes survived beacuse there was fewer people who wore them. Middle- and larger sizes had more supply and demand and therefore they were worn out.
Of course you can find larger sizes now, but they are often expensive since the demand is so high.
I guess we're lucky to have all those replicas being made these days, right?