Heads up: this post has affiliate links, so Manhattan Society may earn a small commission if you buy through them — never at any extra cost to you. I only recommend things I’d tell a friend to buy. Amazon sets prices and stock.
Sometimes the hat IS the costume — throw one on and you’re done. Here are 9 that make any outfit Halloween-ready.
My top pick: A classic black witch hat is the one Halloween accessory that turns jeans and a black top into a full costume in three seconds flat.

1. Classic Witch Hat

The pointed black witch hat — the ultimate last-minute costume. Shop witch hat halloween costume on Amazon →
2. Pirate Tricorn Hat

A pirate hat with skull-and-crossbones for an instant swashbuckler. Shop pirate hat costume on Amazon →
3. Cowboy Hat for Costumes

A cowboy hat for western, cowgirl, and Yellowstone-themed costumes. Shop cowboy hat costume halloween on Amazon →
4. Top Hat

A black top hat for ringmasters, magicians, and Victorian characters. Shop top hat costume halloween on Amazon →
5. Cat Ears Headband

A simple cat-ears headband for the classic last-minute cat costume. Shop cat ears headband halloween on Amazon →
6. Devil Horns Headband

Red devil horns for the easiest devil costume ever. Shop devil horns headband halloween on Amazon →
7. Wizard Hat

A tall wizard hat for Harry Potter and fantasy characters. Shop wizard hat costume on Amazon →
8. Crown and Tiara
A crown or tiara for royalty, princess, and queen costumes. Shop crown tiara costume halloween on Amazon →
9. Beret for Artist Costume
A black beret paired with a striped shirt for an instant artist look. Shop beret costume halloween on Amazon →
The bottom line
A witch hat is the ultimate no-effort costume. Cat ears and devil horns are the last-minute lifesavers, and a pirate hat commits to the character.