Jacqueline Kennedy Onassis made popular which style of women's hat?

Beginning in the early 1960s, Jacqueline Kennedy Onassis made the pillbox hat a very popular style of women's hat. This style of hat (the pillbox hat) is a small hat with a flat crown, straight, upright sides, and no brim. It is named after the small cylindrical or hexagonal cases that pills used to be sold in.

Experts in designing and making women's clothing, career garments, and fashion accessories, have noted that the modern woman's pillbox hat was invented by milliners in the 1930s. This hat gained popularity due to its elegant simplicity. Pillbox hats were mostly made out of wool, velvet, organdy, mink, lynx or fox fur, and leopard skin. Some other materials, man made materials, have also been used. The pillbox hats have mainly been designed in solid colors and were not accessorized with jewellery or similar items. A veil however could be include as part of the hat's design.

Jacqueline Kennedy was the First Lady of the United States from 1961 to 1963. This is when she is best known for her "signature pillbox hats". They were designed for her by Halston. She was wearing a pink one to match her outfit on the day that her husband, President John F. Kennedy, was assassinated in November 1963 in Dallas, Texas.