Vintage swimwear from the 40’s and 50’s (66 pictures)
Despite opposition from some groups, the form-fitting style proved popular. It was not long before swimwear started to shrink further. At first arms were exposed and then legs up to mid-thigh. Necklines receded from around the neck down to around the top of the bosom. The development of new fabrics allowed for new varieties of more comfortable and practical swimwear.
Due to the figure-hugging nature of these garments, glamour photography since the 1940s and 1950s has often featured people wearing swimsuits. This type of glamour photography eventually evolved into swimsuit photography exemplified by the annual Sports Illustrated Swimsuit Issue. Beauty contests also required contestants to wear form-fitting swimsuits.
The first bikinis appeared just after World War II. Early examples were not very different from the women’s two pieces common since the 1920s, except that they had a gap below the breast line allowing for a section of bare midriff. They were named after Bikini Atoll, the site of several nuclear weapons tests, for their supposed explosive effect on the viewer.
Through the 1950s, it was thought proper for the lower part of the bikini to come up high enough to cover the navel. From the 1960s on, the bikini shrank in all directions until it sometimes covered little more than the nipples and genitalia, although less revealing models giving more support to the breasts remained popular. [source]