Formal headwear includes the TIARA, tophat, and TOPPER. A TIARA is a type of crown that is often worn by royalty or brides on their wedding day. A tophat is a tall, cylindrical hat with a flat brim and a narrow brim at the top. It is typically worn by men for formal occasions. A TOPPER is a type of hat that is similar to a tophat but has a wider brim and a higher crown. Tophats are a type of formal headwear that is usually worn by men for special occasions such as weddings or other formal events.