boater hat
A stiff hat with a flat top and brim, and a ribbon around the crown, usually made of straw. They were popular in the late 19th and early 20th centuries.
Examples
Non-examples
- Danbooru post #8563190: Sun hats are also made of straw but have significantly longer brims.
- Danbooru post #6460763: Porkpie hats have a slightly curved brim.
