A stovepipe hat is a style of top hat, a tall hat with a flat brim and broad crown that is used to be an integral part of formal dress. Many people in the United States associate the stovepipe hat with Abraham Lincoln, who often wore one for portraits. By the 1920s, top hats had essentially died out, although they were still worn on some very formal occasions. Most top hats and stovepipe hats today are seen as parts of costumes, rather than as true formal wear.
The design of a stovepipe hat makes it look like a length of piping. The body of the hat runs straight up and down, rather than flaring slightly like a traditional top hat and the crown is utterly flat.