The pillbox hat is named for its resemblance to a pillbox. The pillbox hat is said that its predecessor was a military hat, which later evolved into a women's hat. The pillbox hat we refer to today became popular in Western countries starting in the 1930s. Women in the West loved this hat because it looked elegant and simple.
Among the many fans of the pillbox hat, the most famous is Jacqueline Kennedy, the wife of former U.S. President John F. Kennedy. She wore a pink pillbox hat to the Kennedy inauguration ceremony. So it's also called a Jacqueline Hat. The hat is made from a variety of materials, which gives it a rich range of colors. The characteristic of a Jacqueline hat is that it has no brim. The classic version is box-shaped, while innovative versions may add veils or other decorations.