Barbie was copied after a German doll https://en.wikipedia.org/wiki/Bild_Lilli_doll#History
Barbie started out busty with a thin waist. Here is her progression https://www.popsugar.com/beauty/barbie-beauty-evolution-39101850
I have seen on facebook photos of the supposed real life German model used for the original doll. I have not verified those memes across facebook are true.
Handler wanted girls to be able to play with grown up dolls not just baby dolls. Supposedly, she didn’t want the only toys girls played with to be about becoming a mother. Barbie was an adult and could do anything. Be a lawyer, doctor, own her own house, and wasn’t dependent on a man.
Here is a wikipedia link about Handler https://en.wikipedia.org/wiki/Ruth_Handler
I found it interesting she picked up on this German doll in the 1950’s as her prototype for Barbie being that was a time most Jewish Americans would not step foot or spend money on anything German. I don’t know if she was traveling in Germany or traveling in another country where the doll was sold. Handler was American born to Polish parents.