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Kids Halloween Costume
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Cookie Monster Kids Onesie
Super Mario™ Boys' Suit
Sonic the Hedgehog™ Kids Onesie
Pokémon Boys' Suit
Shadow Kids Onesie
Appa Kids Onesie
Elmo Kids Onesie
Mario Kids Onesie
Luigi Kids Onesie
Knuckles Kids Onesie
SpongeBob™ Kids Onesie
Unicorn Kids Onesie
SpongeBob™ Frenzy Boys' Suit
Minecraft Boys' Suit
Walrus Kids Onesie
Dinosaur Kids Onesie
The Jag Boys' Suit
Shark Kids Onesie
Giraffe Kids Onesie
Otter Kids Onesie
The Dark Knight Boys' Suit
Super Mario™ Boys' Shirt
Red Cat Kids Onesie
Lemur Kids Onesie
Panda Kids Onesie
Lobster Kids Onesie
Aang Kids Onesie
Sandy Kids Onesie
Plankton Kids Onesie
My Little Pony™ - Firefly Kids Onesie
Patrick Kids Onesie
My Little Pony™ - Bluebelle Kids Onesie
Superman™ Kids Onesie
Kids Halloween Costume Ideas for Ages 2 to 8
Looking for a kids Halloween costume for your younger child? OppoSuits' kids Halloween costume collection includes character onesies like Sonic the Hedgehog™, SpongeBob™, and My Little Pony™, animal onesies like dinosaurs and sharks, and boys' suits like Super Mario™ and Pokémon, all sized for kids ages 2 to 8.
Why Choose a Kids Halloween Costume from OppoSuits
- Two costume formats: a full onesie for the most immersive look, or a jacket-and-pants suit version, like Super Mario™ or Pokémon, for a more wearable costume.
- Officially licensed designs from Avatar: The Last Airbender™, DC Comics, Minecraft™, My Little Pony™, Nickelodeon™, Pokémon, Sesame Street™, Sonic the Hedgehog™, SpongeBob™, Super Mario™, and Warner Bros.
- Animal onesies too: not every costume is a licensed character, options like Walrus, Dinosaur, Shark, Giraffe, Otter, Panda, and Lobster work well for kids who'd rather be an animal than a character.
- Sizes 2-4Y and 6-8Y, made specifically for younger kids.
- Easy to coordinate for siblings or friends: pick matching onesies, like the two My Little Pony™ designs (Firefly and Bluebelle), for a group costume.
Good for
- Halloween parties
- Trick-or-treating
- School costume days
- Costume contests
What to check before you buy a kids Halloween costume
A few things to check before you order, so the costume fits and suits the event.
| Styles | Character and animal onesies, boys' suits, and a boys' shirt |
| Licenses | Avatar: The Last Airbender™, DC Comics, Minecraft™, My Little Pony™, Nickelodeon™, Pokémon, Sesame Street™, Sonic the Hedgehog™, SpongeBob™, Super Mario™, Warner Bros. |
| Sizes | 2-4Y and 6-8Y, for kids ages 2 to 8 |
| Delivery | See current delivery times on our shipping page |
Onesie or Suit for Your Kid's Costume?
A onesie, like Cookie Monster or a Dinosaur, is the go-to pick for younger kids who want to be fully in-character and comfortable for a whole evening of trick-or-treating. A suit version, like Super Mario™ or Pokémon, works well for a kid who wants a costume that still looks a bit more put-together, useful for a school event or a family gathering where the dress code isn't quite as relaxed.
Looking for a specific style? Browse all Kids Onesies, just the Animal Onesies, or Halloween Suits for Boys. Got an older kid? Check out the Halloween suits for older kids and teens.
Frequently asked questions about kids Halloween costumes
What sizes do kids Halloween costumes come in?
This collection is sized 2-4Y and 6-8Y, for kids ages 2 to 8.
What's the difference between the onesie and suit costumes?
A onesie is a single, all-in-one costume piece for a full character look, while a suit reworks the same character into a jacket-and-pants set for a more wearable, put-together costume.
Is there a Halloween costume collection for older kids?
Yes, check out Halloween suits for older kids and teens for bigger sizes.
Are there costume options that aren't licensed characters?
Yes, animal onesies like Walrus, Dinosaur, Shark, Giraffe, Otter, Panda, and Lobster offer a non-licensed alternative to the character designs.
When will my order arrive?
Delivery times can change, so check the current estimates on our shipping page before you order.
