Hatpin

Colleen Moore wearing a hat with a hatpin, 1920
Hatpins

A hatpin is a decorative and functional pin for holding a hat to the head, usually by the hair. In Western culture, hatpins are almost solely used by women and are often worn in a pair. They are typically around 6–8 inches (15–20 cm) in length, with the pinhead being the most decorated part.