Blonde Girl Wearing A Red Corset

Corsets were originally quilted waistcoats, worn by French women as an alternative to stiff corsets. They were only quilted linen, laced in the front, and un-boned. This garment was meant to be worn on informal occasions, while stays were worn for court dress. In the 1790s, stays fell out of fashion. This development coincided with the French Revolution, and the adoption of neoclassical styles of dress. Interestingly, it was the men, Dandies, who began to wear corsets. The fashion persisted thorough the 1840s, though after 1850 men who wore corsets claimed they needed them for "back pain".
Stays went away in the late 18th century, but the corset remained. Corsets in the early 19th century lengthened to the hip, the lower tabs replaced by gussets at the hip. Room was made for the bust in front with more gussets, and the back lowered. The shoulder straps disappeared in the 1840s for normal wear.
In the 1820s, fashion changed again, with the waistline lowered back to almost the natural position. Corsets began to be made with some padding and boning. Corsets began to be worn by all classes of society. Some women made their own, while others bought their corsets. Corsets were one of the first mass produced garments for women. Corsets began to be more heavily boned in the 1840s. By 1850, steel boning became popular.
With the advent of metal eyelets, tight lacing became possible. The position of the eyelets changed, they were now situated across from one another at the back. The front was now fastened with a metal busk in front. Corsets were mostly white. The corsets of the 1850s-1860s were shorter than the corsets of the 19th century through 1840s. This was because of a change in the silhouette of women's fashion. The 1850s and 60s emphasized the hoopskirt. After the 1860s, when the hoop fell out of style, the corset became longer to mold the abdomen, exposed by the new lines of the princess or cuirass style.