A Gatsby cap, also known as a newsboy cap or flat cap, is a rounded cap with a small, stiff brim in front. It is typically made from wool, tweed, or cotton and features a button on top. This style of cap became popular in the early 20th century and is often associated with the working class and casual wear. The name "Gatsby cap" is derived from the character Jay Gatsby in F. Scott Fitzgerald's novel, The Great Gatsby. The cap symbolizes the fashion of the 1920s and has since become a timeless accessory, often worn by both men and women for a stylish, vintage look.