Most St. Patrick's costumes come down to two real choices: a leprechaun suit, complete with jacket, hat, and beard, or a green Morphsuit that covers you head to toe in one piece. In our own US search data over the past 12 months, leprechaun-phrased searches outnumber "St. Patrick's Day costume" searches by more than 100 to 1, so the real question isn't whether to dress up. It's which of those two you put on.
The occasion decides it. A leprechaun suit is a character, built for a party where people notice the costume before they notice you. A green Morphsuit is a look: one piece, nothing to lose, built for a parade or a bar crawl where you're on your feet for hours. Both are real St. Patrick's Day costumes we sell.
Table of Contents
- Leprechaun Suit vs. Green Morphsuit: Which One Do You Wear?
- Classic Leprechaun Suits, Fully Accessorized
- The Green Morphsuit, for the Whole Day and Night
- What to Wear to a St. Patrick's Day Parade
- What to Wear to a Bar Crawl or Party
- Groups and Kids
- Why Do We Wear Green on St. Patrick's Day?
- Frequently Asked Questions
Leprechaun Suit vs. Green Morphsuit: Which One Do You Wear?
A leprechaun suit wins on character. It is a costume in the traditional sense, a jacket and hat you put on top of your day, and it still reads as a costume in a badly lit bar photo. A green Morphsuit wins on comfort over a long day: one piece, no separate pieces to keep straight, and full-coverage stretch fabric that moves with you instead of a jacket you have to keep buttoned. Neither is the better costume. Pick by how many hours you'll be wearing it.
| Look | Best for | What's included | Care |
|---|---|---|---|
| Mens Leprechaun Costume | A party where you want the full character look | Green jacket with shirt insert, matching pants, vest, buckled belt, yellow bowtie, top hat with attached ginger hair and beard | Cold hand wash, air dry |
| Mens Irish Leprechaun Costume | A dressier take, sizes Medium through XXL | Green tailcoat with attached clover-print vest, satin lapels, gold-colored buttons, tall clover-print top hat, green bowtie | Cold hand wash, air dry |
| Green Morphsuit | A parade, a bar crawl, or anywhere you are on your feet all day | One-piece full-body 125GSM+ breathable spandex suit, open mesh mask | Cold hand wash, air dry |
Classic Leprechaun Suits, Fully Accessorized
A real leprechaun costume is a full character, not a green shirt and a hat. Our Mens Leprechaun Costume is a complete set: green jacket with a built-in shirt insert, matching pants, a vest, a buckled belt, a yellow bowtie, and a top hat with the ginger hair and beard already attached, so nothing separate gets lost by 10pm. It comes in Medium, Large, and XL.
For a dressier look or a bigger size, the Mens Irish Leprechaun Costume swaps the jacket-and-vest combo for a green tailcoat with a built-in clover-print vest, satin lapels, and gold-colored buttons, plus a tall clover-print top hat and a green bowtie. It runs Medium through XXL, and dries flat, away from direct heat.
For a fast, funny group entrance, the Leprechaun Piggyback Costume creates the illusion that a tiny Irish visitor has hitched a ride on your back. It's a lightweight, one-piece polyester design with a stuff-your-own-legs build, worn right over your regular clothes. One size fits most adults.
For women, the Womens Sexy Leprechaun Costume pairs a green clover-print dress with a buckled belt, striped knee-high socks, and a large green top hat, in sizes S through XL. Every leprechaun costume on this page is a cold hand wash, air dry: no machine.
The Green Morphsuit, for the Whole Day and Night
A green Morphsuit is the other real answer to "what's a St. Patrick's Day costume": full head-to-toe green, no jacket to keep on, no hat to hold onto. Every Morphsuit is a one-piece, 125GSM+ breathable spandex suit with an open mesh mask, not a solid panel, so you can see out, talk, and drink without taking it off. There's nothing to unbutton and nothing to lose in a crowd, which is the whole appeal for a day that starts with a parade and ends somewhere loud. Every costume goes through over 30 measurement checks. That's a separate fact from fit: the size guide on each product page is what to check before you order. Our explainer on the Morphsuit design covers the full build if you have not worn one.
It's also the only look here you can put on at breakfast and still be wearing at closing time without adjusting anything. The shape is common enough now that other costume sites list a "green Morphsuit" as a product type of its own, a fair enough description, even though the Morphsuit itself is our design.
What to Wear to a St. Patrick's Day Parade
Dress for a cold, all-day outdoor event, not a party. New York's parade, the world's oldest civilian parade and the largest in the US, dates to 1762 and draws over 150,000 marchers along its 1.75-mile route, with March days averaging in the mid-30s overnight to high-40s by afternoon. A green Morphsuit under a coat handles that: pull the coat off for photos, put it back on between blocks. A leprechaun suit's jacket and vest do the same job, but the hat and beard are easier to keep track of standing still than moving through a crowd.
- Layer, don't bulk up. A plain long-sleeve top under a Morphsuit or under a leprechaun jacket adds warmth without changing the silhouette.
- Carry the top hat, don't wear it in. It's the piece most likely to arrive crushed, and a bag treats it better than a subway car does.
- Pick shoes for standing on pavement for hours, not the shoes that match the costume best.
What to Wear to a Bar Crawl or Party
Indoors and on your feet for hours: comfort matters more here than layering for weather. A green Morphsuit's 125GSM+ breathable fabric means you're not sweating through a jacket by midnight, with no vest or belt to keep adjusting on a crowded dance floor. The Mens Leprechaun Costume still works here and reads better in a group photo lineup: the jacket and hat land as a costume where a solid green suit just lands as green.
Either way, plan for the pinching. American folklore says wearing green makes you invisible to leprechauns, who pinch anyone not wearing it. It's a US custom, not an Irish one, and it's the easiest reason to check everyone in your group has green on before you leave.
Groups and Kids
For a family or group St. Patrick's Day, mix the pieces: a leprechaun suit or two for the photo, a run of green Morphsuits for everyone who'd rather move than pose, and a piggyback costume for whoever wants the joke. Our Kids Green Morphsuit uses the same 4-way stretch fabric as the adult version, with a quick-release hood that comes off without removing the whole suit, plus double zips and reinforced stitching at the stress points. It's available in small, medium, and large; check the size guide against your child's height before ordering. Cold hand wash, air dry, same as the leprechaun suits.
Why Do We Wear Green on St. Patrick's Day?
Green is the modern color, but it wasn't always. The earliest depictions of St. Patrick show him in blue, and the Order of St. Patrick, founded under King George III, took a sky blue known as "St. Patrick's blue" as its color. Green took over later, tied to the shamrock St. Patrick reportedly used to explain the Christian Trinity and to Irish identity through the late 18th and 19th centuries, long after the first recorded US parade marched in Spanish colonial St. Augustine, Florida, in 1601.
It's a big holiday for us now, too: the National Retail Federation puts 2026 US spending at a record $7.7 billion, up from $7 billion the year before, with 60% of US consumers celebrating. Wearing green tops their list of planned activities, which is why the costume question keeps landing on the same two answers.
Frequently asked questions
What do people wear for St. Patrick's Day?
Most people wear one of two things: a leprechaun suit (jacket, hat, and beard) or a green Morphsuit that covers you head to toe in one piece. Wearing green in some form tops the National Retail Federation's list of planned 2026 activities, ahead of a special dinner or a night out.
What color should I wear for St. Patrick's Day?
Green. It's been the color associated with the holiday since the late 1700s, tied to the shamrock, even though St. Patrick himself is originally depicted in blue. Green also ties into the American custom of pinching anyone who isn't wearing it, so it's the safer color to plan around.
What makes a good leprechaun costume?
A complete leprechaun costume includes a green jacket and pants, a vest, a bowtie, a buckled belt, and a top hat, ideally with the beard already attached so it can't come loose during the night. Our Mens Leprechaun Costume includes all of that as one set, sized Medium through XL.
Do you get pinched if you don't wear green on St. Patrick's Day?
It's a US custom, not an Irish tradition: the story goes that wearing green makes you invisible to leprechauns, who pinch anyone they can see. The custom has stuck in the US, so it's an easy reason to make sure your group has green on before you head out.
Why did green become the color for St. Patrick's Day?
St. Patrick himself was originally shown wearing blue, and the Order of St. Patrick, founded under King George III, took a sky blue called "St. Patrick's blue" as its own color. Green took over through the late 1700s and 1800s, linked to the shamrock and to Irish national identity, and it's been the default ever since.
Is a Morphsuit warm enough for an outdoor parade?
Layer underneath it and it holds up fine for a cold, all-day event. The 4-way stretch fabric has enough give for a long-sleeve top or leggings under it, and a coat goes on over the top between parade blocks and comes off again for photos.
