A gangster costume is the 1920s and 1930s look built from a sharp pinstripe suit, a fedora and a few well-chosen accessories, with the flapper dress as its speakeasy counterpart. It is one of the easiest period looks to get right, because the silhouette does most of the work and every piece is real clothing you can move and sit in all night. Below we pick the gangster costumes worth buying for men, women and kids, each one a complete pack rather than a jacket you have to finish yourself, and every design clears more than 30 measurement checks so it fits the way the photo promises.
Table of Contents
- What makes a costume read as 1920s gangster
- The classic gangster suit for a Halloween party
- The flapper look for a speakeasy or Gatsby night
- Little gangsters: costumes for kids
- Dressing a couple or a whole crew
- Gangster costumes compared
- Fit, fabric and finishing the look
- Frequently asked questions
What makes a costume read as 1920s gangster
The look comes straight out of the Prohibition years. National Prohibition took effect in January 1920 and ran until it was repealed in December 1933, and the speakeasies, bootleggers and organized crime of that decade gave us the whole visual shorthand (History.com, Prohibition). For men that means a pinstripe suit with a waistcoat, a wide-brimmed fedora and a bold tie; for women it means a drop-waist flapper dress with fringe or beading, a feather headband and long gloves. Get those silhouettes right and the era reads instantly, which is why it is a favorite for decades parties, murder-mystery nights and Halloween alike.
The good news is you do not need a real vintage tailor. Everything here sits in our 1920s costumes range, part of the wider decade costumes collection, so you can dress a couple or a whole group from one place and keep the era consistent.
The classic gangster suit for a Halloween party
If you want one costume that works at any adult party, the pinstripe suit is the safe call. It is smart enough to keep you comfortable in a bar or at a table all evening, and it is the single most recognizable gangster look there is.
Mens 30s Gangster Costume
Our Mens 30s Gangster Costume ($50.95) is the complete pinstripe look in one pack: a pinstripe jacket, matching pants and an attached tie, so there is nothing to hunt down separately. Add your own dark shirt and shoes, top it with a fedora, and you are done. Because it is real suiting rather than a printed jumpsuit, it moves and sits like normal clothes, and every design clears more than 30 measurement checks so it lands true to size.
The flapper look for a speakeasy or Gatsby night
The flapper is the woman's half of the 1920s scene, and it is just as easy to pull off. A drop-waist flapper dress reads as roaring-twenties on sight, and it is built for a night of dancing rather than standing still.
Womens 20s Flapper Costume Red
The Womens 20s Flapper Costume in red ($37.95) comes as a three-piece set: the red dress, elbow-length gloves and a feather headband, so the whole look arrives together. It suits a decades party, a Gatsby-themed night or Halloween, and it pairs naturally with the pinstripe suit for a couple. The tailored fit and our measurement checks mean it hangs the way it should rather than swamping you.
Little gangsters: costumes for kids
A kids' gangster suit is one of the best-value costume-day picks going, because it is a full outfit that actually looks smart in photos rather than a flimsy tabard. It works for a decades day at school, a themed party or trick-or-treat, and it is easy to get on and off.
Kids Little Gangster Costume
The Kids Little Gangster Costume ($42.95) is a proper little suit: a pinstripe jacket, matching pants, a shirt-insert with an attached tie and a matching hat, all in the pack. The shirt-insert means no fiddly separate shirt to iron, and the hat finishes the look without extra shopping. Check the boys' size guide against your child's measurements and size up if they are between two sizes.
Dressing a couple or a whole crew
The 1920s theme is one of the best for groups, because the pieces coordinate without matching exactly. A pinstripe suit and a flapper dress make an obvious couple; a row of suited-up friends with one or two flappers reads as a whole speakeasy crew. It photographs far better than a room of unrelated one-offs, which matters on the biggest dress-up night of the year: US shoppers are set to spend a record $13.1 billion on Halloween in 2025, with 51% planning to wear a costume (National Retail Federation, 2025).
If you are building a wider decades event, our roaring 20s outfits guide covers the era beyond the gangster angle, and the rest of the decades range lets you span more than one era if the party theme is bigger than one decade.
Gangster costumes compared
| Costume | Who it is for | In the pack | Price | Best for |
|---|---|---|---|---|
| Mens 30s Gangster Costume | Men | Pinstripe jacket, pants, attached tie | $50.95 | Any adult party, all-night comfort |
| Womens 20s Flapper Costume Red | Women | Dress, elbow-length gloves, feather headband | $37.95 | Dancing, Gatsby and speakeasy nights |
| Kids Little Gangster Costume | Kids | Jacket, pants, shirt-insert with tie, hat | $42.95 | Costume day, themed party, trick-or-treat |
Fit, fabric and finishing the look
A gangster look lives on the details, and most of them are things you already own or can add cheaply. For the men, a fedora, suspenders and a dark shirt do the heavy lifting; a pocket square or a toy violin case is the finishing touch. For the flapper, the feather headband and long gloves come in the pack, so a string of faux pearls and a small beaded bag are all you need to add. The suit and dress carry the outfit; the accessories sell it.
On quality, this is where a real costume beats a no-brand factory version that arrives thin, ill-fitting and nothing like the photo. Every MorphCostumes design goes through more than 30 measurement checks against our size charts, and we run over 500,000 quality checks a year, so the fit is the default rather than the gamble. Each costume comes with everything the pack lists, so you are not left completing the look yourself on the night. Care is simple: a cold hand wash and air dry keeps the fabric and any fringe right for next year, so treat these as reusable rather than one-night throwaways.
Frequently asked questions
What is a 1920s gangster costume?
It is the Prohibition-era look, built for men from a pinstripe suit, a fedora and a bold tie, and for women from a drop-waist flapper dress with fringe, a feather headband and long gloves. The era ran from 1920 to 1933, and the speakeasy scene of that decade is where the whole style comes from.
What do you wear for a gangster costume?
Start with a pinstripe suit, then add a fedora, a dark shirt and a bold tie; suspenders and a pocket square finish it. Our Mens 30s Gangster Costume comes as a jacket, pants and attached tie, so you only add the shirt, shoes and hat yourself.
What should a woman wear for a 1920s gangster or speakeasy theme?
A flapper dress is the classic choice. Our Womens 20s Flapper Costume in red arrives as a three-piece set with the dress, elbow-length gloves and a feather headband, so the look is complete out of the bag, and it pairs naturally with a pinstripe suit for a couple.
Is there a good gangster costume for kids?
Yes. Our Kids Little Gangster Costume is a full little pinstripe suit with a jacket, pants, a shirt-insert with an attached tie and a hat, so it looks smart in photos and is quick to get on. It works for a decades day at school, a themed party or trick-or-treat.
Are these costumes true to size?
Yes. Every design clears more than 30 measurement checks against our size charts, so true-to-size is the default. Check the chest, waist and height on each product page, and size up if you are between two sizes.
