Rockabilly and pin-up are two separate styles. They are often mistaken for each other, as these two are distinguished with bright makeup, colorful clothes, and mysterious smiles. However, rockabilly was formed later, under the influence of rock-n-roll, as this music genre demanded a new way to self-expression. Thus, rockabilly can be called a son of pin up, which inherited the bright colors and free behavior from its mother, but added a bit of sass, tattoos, and insane dancing into its style. If you recognize yourself in this description – rockabilly was definitely created for you!

Women usually chose a pair of cigarette pants with side or back zippers. These pants were cut full through the hips tapering to slim- fitting legs. Most cigarette pants ended just above the ankle allowing women to show off their stylish footwear. They had a high waist usually accentuated with a 3 inch waistband. Some women broke up the wide waistband with a thin leather belt. Early on, these pants were mostly black, but by the end of the decade women were expressing their own unique style by wearing stripes, leopard prints, checks and polka dots. Consider adding a pair to your wardrobe by getting these from Unique Vintage (@uniquevintage)

True vintage clothing was produced in the era you are trying to portray, whereas retro clothing looks like it’s from that era but was made more recently. Retro is a copy of the real thing produced in mass market, whereas vintage is the real thing. If your clothing was made before the eighties, check for the “Made in the USA” seal or whatever country you are situated in. On the tag there should be a union name and ID number. A tag that says “Made in China” is a sign that the article of clothing is not vintage.
Pin-up fashion is synonymous to and a combination of Burlesque, Rockabilly and Old Hollywood Glamour in terms of clothes, hair, makeup, shoes and accessories. It's all about being classy yet elegant, flirty without going overboard. It's more on minimalism and simplicity with just a little skin exposure. With a little cleavage men are teased. This style celebrates women, from their curves to their flawless faces. Don't worry if you think you aren't skinny enough to pull off the perfect pin up girl look. The pin-up  culture embraces your natural hips and curves. 
The clients you would most likely come across for this style are vintage enthusiasts, pin up pageant girls and burlesque artists, as well as people going to costume parties. There are also always drag queens and the secret “I Love Lucy”-obsessed people from that era who are holding onto nostalgia. Either way, this style is great fun to create and will come in handy when you least expect it, or when you want to embrace your inner silver screen goddess.
Rockabilly is a modern-day recreation of the pin-up look that is a music style and often associated with the burlesque. In addition to having things in common with pin-up style, rockabilly also favors cherries, animal print, roses, and sugar skull patterns for clothes and purses. Sparrows, bows, roses, stars, sugar skulls, casino- and nautical-themed accessories are also popular.
The classic style of the pin-up originates back from the 1940s. Due to the shortages of materials during WWII, this period of makeup is considered the "natural beauty" look.[20] The US was immersed in war-time economy, which put distribution restrictions on consumer goods.[21] General rationing was supported; women applied mild amounts of products. Despite the rations, "Women were encouraged to keep buying lipstick and to send letters to the front covered in 'lipstick kisses' to boost the morale of the soldiers." 
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