Read my article Sammy Davis, for complete details, but no fashion designer had more influence on the 1950s fashion than Christian Dior. His influence can be seen in the A-line dress that he introduced in the spring of 1955. Until that point, women had worn fashions with tightly nipped-in waist and broad shoulders. The A-line was seen as radical because of its narrow shoulders, elongated waistline and trumpet-like flared hemline. Take a look at this vintage A-line dress from Rose Wholesale (@rosewholesale_official) to create this look for yourself.
For some sugary sweet 1950s diner vibes, pick out a vintage inspired dress. If you don't have one in your own collection, ask around; this '50s style of swing dress has made a massive comeback in recent years, so someone you know is bound to have one. Maybe your mom, aunt, or granny might have one in their attic and you'll get extra style points for wearing an original.
Another very popular style was the shirtwaist dress. Originally, introduced by Christian Dior in 1947, this style of dress was particularly popular with teenagers. It is set apart by its sloped shoulders which were a drastic change from the boxy shoulders just a few years before. This dress also has a raised bust line. The real change, however, came with a very narrow waist starting with a padded hipline and flowing away to a skirt with lots of fabric that was often pleated ending just below mid-calf. Wear this casual dress on your next shopping trip by getting this one from EricDress (@ericdress.com).