What do you wear to a murder mystery party?

It depends on the theme, but common eras include the 1920s (flapper dresses and gangster suits), the 1950s (poodle skirts and leather jackets), or classic Victorian sleuth attire.

How do I make a DIY detective costume?

Combine a tan trench coat or overcoat from a thrift store with a brimmed hat, and carry a magnifying glass and a small notebook as props.

What are some easy mystery costume ideas?

The classic detective, a vintage spy in a trench coat and sunglasses, or characters from the board game Clue are all highly recognizable and easy to assemble.

AI-generated example

Mystery Costumes

Step into the intrigue with classic detective and murder mystery styles.

Mystery costumes are a go-to choice for interactive party games, theatrical events, and Halloween. Whether you are playing a classic noir detective or dressing up for a themed 1920s murder mystery party, these outfits rely on vintage silhouettes and recognizable props to tell a story. This guide focuses on the quintessential detective look—the ultimate symbol of mystery.

Difficulty: Easy
Time: ~20 min
Budget: $30–90

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40 Mystery costume ideas

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What you need for a Mystery Costumes costume

Double-breasted trench coat
A classic knee-length trench coat in khaki, beige, or tan with a belted waist.
DIY: Use any long neutral overcoat or a vintage raincoat.
Amazon
Deerstalker hat or fedora
A brown plaid deerstalker hat for a Sherlock Holmes vibe, or a dark felt fedora for a noir detective look.
DIY: A dark vintage brimmed hat or a flat cap can work in a pinch.
Amazon
Magnifying glass
A classic handheld magnifying glass with a black or wooden handle.
DIY: Cut a magnifying glass shape out of cardboard and use clear plastic wrap for the lens.
Amazon
Prop pipe
A classic curved tobacco pipe prop, made of plastic or wood.
Amazon
Vintage-style notepad and pencil
A small, pocket-sized spiral notebook and a classic yellow pencil for jotting down clues.
DIY: Use any small notepad you have at home and scuff the edges for a worn look.
Amazon

How to put it together

1
Put on your base clothing, such as a button-down shirt, dark trousers, and dress shoes.
2
Slip on the khaki trench coat and fasten the buttons, or tie the belt loosely to show off your outfit underneath.
3
Place the deerstalker hat or fedora firmly on your head, tilting it slightly forward for a touch of intrigue.
4
Tuck the small notepad and pencil into your trench coat's breast pocket so they are easily accessible.
5
Hold the magnifying glass in one hand and the prop pipe in the other to complete the classic sleuth pose.

Makeup & hair

Keep hair neat and tucked under the hat. For a noir detective, a clean-shaven look or a thin mustache works well, while makeup should remain minimal and natural.

Mystery Costumes for couples, groups, kids & more

couples: Pair a classic detective with a glamorous 1920s 'femme fatale' or a mysterious suspect in a vintage evening gown.
group: Recreate a classic Clue-style lineup with characters dressed in solid, color-coded vintage outfits (red, purple, green, mustard).
kids: A miniature detective with an oversized trench coat, a plastic magnifying glass, and a tweed flat cap.
Plus size: A double-breasted trench coat worn open over a dark vest and trousers provides a comfortable, structured fit.
pet: A small tweed cape and a tiny matching deerstalker hat for a Sherlock-inspired pet look.

Tips

Wear comfortable dress shoes, as mystery parties and trick-or-treating involve a lot of standing and walking.
Keep your hands free by utilizing the deep pockets of your trench coat to store your phone, wallet, and props.
If attending a murder mystery game, make sure your outfit matches the specific era designated by the host (e.g., 1920s, 1950s, or 1990s).
Practice your best dramatic squint through the magnifying glass for fun photo opportunities.

Mystery Costumes costume FAQ

What do you wear to a murder mystery party?: It depends on the theme, but common eras include the 1920s (flapper dresses and gangster suits), the 1950s (poodle skirts and leather jackets), or classic Victorian sleuth attire.
How do I make a DIY detective costume?: Combine a tan trench coat or overcoat from a thrift store with a brimmed hat, and carry a magnifying glass and a small notebook as props.
What are some easy mystery costume ideas?: The classic detective, a vintage spy in a trench coat and sunglasses, or characters from the board game Clue are all highly recognizable and easy to assemble.

Did you know? The iconic deerstalker hat and magnifying glass look was never actually mentioned in Arthur Conan Doyle's original Sherlock Holmes texts; it was popularized by illustrator Sidney Paget in the Strand Magazine drawings.