The phrase "a small hat" is correct and usable in written English.
It can be used to describe the size of a hat, indicating that it is not large.
Example: "She wore a small hat that perfectly matched her outfit."
Alternatives: "a tiny hat" or "a little hat".
Her wild coiffure is more effective than when her hair is hidden by a small hat.
John prefers "something wool that's a bit tighter", oilskins and a small hat.
At the bottom of a Dose post, there is usually a small "hat tip" (abbreviated as "H/T").
She wore a small hat and a tight-bodiced, full-skirted shiny dark green dress – like one of my New York aunts dressed for a cocktail party.
His current works in development include The Universe is a Small Hat, a multiplayer participatory musical at Berkeley Rep Ground Floor, Civilians R&D Group, PRELUDE NYC, Babycastles, and Sarah Lawrence College; and NOISE at New York Univesity/Playwrights Downtown.
Norman Trapper, a salesman at a small hat and clothing store on Franklin Avenue who said he felt that the police acted too aggressively in trying to control crowds, blamed young people for coming armed to the parade.
This will take all day, but the result will be a smaller hat that is fitted to the shape of your head.
The Tramp, described as an oxymoronic vagrant with the dress and manners of a gentleman, wears baggy pants, a tight coat, and big shoes accessorized with a cane, small hat, and a tiny moustache that Chaplin believed added age without masking his expressions.
And then there's Ringo Starr bopping his way through "Honey, Don't" (by Harrison's beloved Carl Perkins), while Lynne plays guitar and wears a very small hat.
Sitting on his couch surrounded by a dozen of his new creations - a large, blue-fur felt hat, a small black hat with black and green taffeta petals jutting out from the front and a bowl-shaped sparkling red and black sequined hat - the designer talked about the reason hats are not too popular.
