19 Halloween Costumes for Brothers That Actually Work (Even With a 5-Year Age Gap)

Two Octobers ago, my friend Dana tried to put her sons in matching Mario and Luigi outfits. Her seven-year-old loved it.

Her three-year-old lasted until the first porch, sat down on the sidewalk, and refused to move until someone took the hat off.

She ended up carrying him, the hat, and a pumpkin bucket for the rest of the night.

That’s the real challenge with Halloween costumes for brothers: it isn’t just picking something cute, it’s picking something that works for two (or three) kids with different ages, sizes, moods, and opinions.

One wants to be scary, the other wants to be funny, and somebody always wants to wear the cape.

So I’ve sorted the ideas below with that in mind. You’ll find classic duos, funny pairings, DIY Halloween costumes for kids that cost very little, and a few options for brothers with a big age gap or a third sibling who wants in.

Most of them can be done as last-minute Halloween costume ideas too, using clothes already in the closet.

1. Mario and Luigi

This is the obvious pick, and it’s popular because it works. Red shirt and blue overalls for one, green shirt and blue overalls for the other. Add a cap with a letter on it, and a mustache drawn with eyebrow pencil (stick-on ones peel off in about ten minutes).

The trade-off is the hat, as Dana found out. For little kids I’d skip it and use a headband or just draw the logo on a t-shirt. Denim overalls are also a smart buy because they get worn all year, which makes this one of the better budget Halloween costumes on the list.

Pro tip: Let the younger one be Luigi if he’s the taller of the two. It’s a small thing but photos look better when the “lead” brother is the one with the red cap.

2. Batman and Robin

An older brother as Batman and a younger one as Robin is a natural fit, since the sidekick is supposed to be smaller. Black hoodies make a good base for Batman, and a red and yellow vest or tunic works for Robin.

Skip the plastic muscle-chest suits, which are hot and stiff. A hoodie with a felt bat symbol and a simple cape made from a black fabric rectangle is more comfortable, and the cape can be tied at the neck with a soft ribbon rather than a scratchy velcro closure.

3. Thing One and Thing Two

This is the easiest costume on the list. Red jumpsuits or red sweatshirts and sweatpants, plus a white patch with a “1” and “2” on the chest, and a blue wig if they’ll wear one. The wig is the part that goes wrong, so a blue knit beanie with strips of blue felt sewn on also works.

I like this pairing for brothers close in age who want to be silly. It also adds a third option if a third brother or a cousin joins in later: Cat in the Hat, or a Thing Three you make up yourself.

4. Ghostbusters

Two brothers in tan or khaki jumpsuits with homemade proton packs are an eye-catching duo. Use cardboard boxes, silver paint, and bottle caps for the buttons, and attach everything to a school backpack so the straps are padded.

One thing I’d warn about: the packs look great and then get heavy if they’re made from a full-sized box. Keep them small and lightweight, and use a pool-noodle wand in place of anything rigid.

5. Woody and Buzz Lightyear

Buddy pairings work especially well for brothers who actually get along. Woody is a plaid shirt, jeans, a cowboy hat, and a sheriff badge cut from cardboard and covered in foil. Buzz is a white long-sleeve shirt with green and purple felt panels and a pair of cardboard wings if you want them.

Most store-bought Buzz costumes have wings that are tough to sit down in, and kids tend to catch them on doorframes. A homemade vest-style version is a lot less awkward, and your son can still turn on a little flashlight “laser” if he wants.

6. Peanut Butter and Jelly

A classic food duo that’s good when you want something funny. Use brown felt or a tan sweatshirt for the peanut butter, and a purple sweatshirt for the jelly with a hand-lettered label on the chest like a jar.

It works for brothers of any age, because the costumes are baggy and forgiving. If you have a third brother, he can be the bread, in a cardboard sandwich board painted tan.

7. Astronaut and Alien

Here’s one I like for an older and younger pair. The older brother is the astronaut in a white jumpsuit or coveralls with NASA patches, and the younger one is the alien in a green hoodie with felt antennae and big googly eyes glued to the hood.

It tells a little story, which makes it good for photos: the astronaut “found” a small alien. A pair of coveralls from a hardware store runs roughly $20 to $30 and is warm enough for cold climates.

8. Sonic and Tails

Blue hoodie with spikes made from stuffed felt for one brother, and an orange hoodie with a white-patched belly and two tails made from stuffed fabric for the other. Add white gloves and sneakers.

Spikes can be sewn on or attached with hot glue, though glue won’t survive a washing machine. Tails are easier for a small kid to wear if they’re pinned to a belt loop rather than attached to a hood, because they don’t pull on his neck.

9. Minecraft Steve and Creeper

Steve is a teal t-shirt, blue pants, and a brown-haired blocky look made from a cardboard box. The creeper is a green box costume or a green hoodie with a pixelated face drawn on.

My honest advice: use a box head for one brother only. Two kids with box heads bumping into each other is funny for about twenty seconds, then someone cries. Let the second brother wear the green hoodie and pixel face instead.

10. Mad Scientist and Frankenstein’s Monster

A lab coat (a white men’s dress shirt from a thrift store works) for one, and green face paint, a dark jacket, and flat-top hair for the other. It’s a theatrical pairing that older boys like because there’s some acting involved.

For the monster, a bit of green face paint and two fake bolts made from foam is plenty. Full-face masks make it hard to see and breathe, so I’d skip them for anyone under ten.

11. Fisherman and Fish

This one is funny, and it works well when the age gap is large. The older brother wears a vest, a bucket hat, and rubber boots, and carries a toy fishing rod with a stuffed fish on the end. The younger one is the fish, in a blue or orange sweatshirt with felt fins and a tail.

It’s a good option for a toddler who is going to be carried or pulled in a wagon, because the fish can be a full-body cozy outfit. I saw this at a neighborhood parade last year and the little “fish” got more attention than anyone else on the street.

12. Knight and Dragon

The older brother is a knight in gray sweats with silver duct tape “armor” and a cardboard shield, and the younger one is a dragon in a green hooded sweatshirt with felt spikes and cardboard wings.

Make the dragon’s hood the focus, with felt eyes and a small snout, rather than a full mask. Pair it with a wagon “cave” if you’re willing to put in the work: a big box painted gray makes a good prop for a toddler.

13. Ash and Pikachu

A red cap, jacket, jeans, and a belt with Poké Ball props for the trainer. A yellow hoodie with brown stripes on the back and a tail made from stuffed felt for Pikachu.

A tail pinned to a hoodie is much more comfortable than a full jumpsuit. If the brothers are more than a few years apart, the younger one almost always picks Pikachu, and the older one is happy to be the trainer.

14. Cowboy and Horse

Older brother in a hat, vest, and jeans with a bandana, younger brother in a brown hoodie with a felt mane and a stick horse head. Or the opposite: the younger one rides the older one’s back for a “piggyback horse” photo if he’s light enough.

The stick horse is a nice touch because it also keeps his hands busy. It’s inexpensive to make from a sock and a dowel, or you can buy one for about $10 to $15.

15. Construction Workers

Orange vests, hard hats, jeans, and toy tools. This one might be the best last-minute costume idea in the whole list because it’s mostly pieces you can buy at the dollar store or already own.

It’s also a good “no complaints” costume. Kids can wear it over a sweatshirt, carry a small toolbox as a candy bucket, and nobody has to wear anything on their face. Add reflective vests and you have some safety built in.

Pro tip: Reflective vests designed for construction are cheap and legitimately useful for trick-or-treating. Look for kids’ sizes rather than adult ones that hang to their knees.

16. Lego Minifigures

Two minifigs in different jobs (firefighter, astronaut, chef) is a fun way to do a duo without matching exactly. Yellow beanies or yellow face paint, a themed shirt, and yellow gloves complete the look.

If they’re willing to wear boxes on their heads, the effect is stronger, but I’d treat the boxes as optional. A flat circular “stud” cut from cardboard and attached to a hat is a simple way to suggest the figure’s head without blocking vision.

17. Football Player and Referee

Great for sports-obsessed brothers. One wears an actual jersey and sweats (use real team gear he already has), the other wears a black and white striped shirt with a whistle and a yellow flag made from a washcloth.

The referee costume is funny because the younger kid gets to boss around the older one. Just make sure the whistle is actually a toy one, because a real one will be blown constantly by about the second house.

18. Pirate Captain and First Mate

Striped shirts, bandanas, brown pants tucked into boots or tall socks, and a vest or jacket for the captain. A stuffed parrot sewn onto the younger brother’s shoulder is the type of detail kids remember.

Pirate gear tends to be loose and layerable, so it’s one of the most comfortable Halloween costumes for brothers when the night is cold. For a third brother, add a ship’s cook or a cabin boy with an apron and a wooden spoon.

19. Three or More Brothers: The Team Approach

With three brothers, you can skip the duo format and pick something with built-in roles: Teenage Mutant Ninja Turtles, a band (drummer, guitarist, singer), a superhero team, or a sports team. These are easier for a larger group because everyone gets a distinct but matching role.

For a band, use simple outfits and cardboard instruments. It’s inexpensive, and it works across big age gaps because even a toddler can hold a tambourine. If one brother hates the plan, let him swap roles rather than force it, because a unified group with one unhappy member makes for an unhappy night.

Matching vs. Coordinating vs. Contrasting: Which Brother Costume Style Is Right?

Before you buy anything, it helps to decide which style fits your boys. Here’s a simple way to think about it.

Style	Examples	Typical cost	Best when
Matching	Thing One and Two, Construction Workers, Lego Minifigs	$10-$30 total	Brothers are close in age and similar in size
Coordinating (same theme, different roles)	Mario and Luigi, Ghostbusters, Pirate Crew	$15-$40 total	You want a group look without identical outfits
Contrasting (hero and sidekick, pair with a story)	Fisherman and Fish, Knight and Dragon, Astronaut and Alien	$15-$35 total	There’s a big age gap, or one brother is a toddler

Prices are rough estimates for a DIY approach using thrift and discount stores and will vary by region. Packaged sets can cost more, especially for two or three kids.

How to Plan Halloween Costumes for Brothers With Different Ages

If your boys are more than three or four years apart, it’s worth planning with the younger one in mind first. A toddler’s comfort level sets the ceiling for the whole night, since he’ll be the one most likely to melt down. Pick the little one’s costume, then build the older one’s around it. A pairing with a clear story (fisherman and fish, cowboy and horse) works well here, because the older brother gets a more grown-up role.

It also helps to let each boy have some say. Give them a shortlist of three options, and let them vote. They’re more likely to wear the costume willingly if they helped pick it.

Pro tip: Do a “dress rehearsal” a few days ahead for 15 minutes. If a hat, tail, or mask is already annoying in the living room, it’s going to be unbearable at the third house.

Frequently Asked Questions

What are the best Halloween costumes for brothers with a big age difference?

Story-based pairings work best: fisherman and fish, knight and dragon, cowboy and horse, or astronaut and alien. The older brother gets a more heroic role and the younger one gets a comfortable costume that’s easy to wear.

How much should I budget for two matching costumes?

DIY costumes using thrifted clothes, felt, and cardboard generally land between $15 and $40 total for two kids. Store-bought sets can easily cost $25 to $60 per child, so it’s worth checking reviews on sizing and fabric quality first.

What if my brothers can’t agree on anything?

Choose a theme with different roles, like Ghostbusters, a pirate crew, or a superhero team. They share a look without having to wear the same thing, and each boy picks his own character.

What are some good last-minute Halloween costume ideas for brothers?

Construction workers, football player and referee, Thing One and Thing Two, and pirates all use clothes you may already have. You can pull any of them together in under an hour.

How can I make costumes comfortable for cold weather?

Go with hoodie-based or loose designs that fit over warm layers. Avoid tight spandex suits, full masks that fog up, and anything that restricts movement near stairs or curbs.

Should brothers’ costumes match exactly?

No, and often they shouldn’t. Coordinating costumes with a shared theme tend to feel more natural to kids, and they look just as good in photos.

What I’d Do First If I Were Planning This Year

I’d start with the youngest brother. Ask him what he wants, test it for comfort, and then build the older boy’s costume around it. That one change is what finally saved Dana’s Halloween the next year: her toddler picked a fish, her older son became the fisherman, and nobody got carried home.

Whichever of these Halloween costumes for brothers you choose, keep safety pins and a hot glue gun handy, add reflective tape to the back, and let the boys have a say. The rest usually works itself out.