Anyone keen on dressing up for fun costume themes should consider costumes by letter. Often referred to as letter parties, guests are assigned a letter that their costume should reflect, either through the luck of the draw or assignment in the invitation. Letter costumes have even been done for school spirit week! No matter the occasion, what costume would you wear for the letter "K"? Take a peek at these cool letter "K" costume ideas.
1. Ken Costumes
| Rollerblade Ken Costume | Ken Doll Box Costume | Pink Leopard Print Costume | Dream Boy Vest |
The Barbie movie reminded us that Barbie and Ken make great Halloween costume ideas. You won't be able to get Kenough of these men's costumes! Wear one of his wild outfits like rollerblade Ken or pink leopard print Ken. Or, pick something less flashy, like a classic Ken doll box costume or his jean vest. These letter "K" costume ideas are crazy good!
2. KISS Costumes
| Demon Costume | Spaceman Costume | Starchild Costume | Catman Costume |
When we mention KISS costumes in all caps, we're talking about the band—not Hershey's Chocolate Kisses. This is a great group costume idea for the letter "K" and works well for music-themed parties or 70s and 80s themes. Use this versatile costume idea to stand apart from the crowd, no matter the occasion!
3. Knight Costumes
| Adult Knight Costume | Kids' Royal Knight | Child Black Knight | Crusader Knight Costume |
Have you ever wanted to be a knight of the Round Table? Letter "K" costume ideas keep improving, with favorites like the loyal knight! (We'd love to see a few women knights representing, too, such as Joan of Ark.) We also love that you can hang onto your party costumes to use again for events like Renaissance festivals. Some of the best costumes are the ones you can reuse!
4. King Costumes
| Medieval King Costume | Child King Costume | Kids' European King | King Henry Costume |
They say that you should dress for the job you want, not the job you have. So, why not dress as a king for a day? (Or at least an evening!) Like the knight costumes, historical king costumes also work well repurposed for Renaissance festivals. Accessorize with a crown and a scepter if you want to go all-out. You'll certainly look the part!
5. Krampus Costumes
Some people like wearing costumes instantly recognizable to theme parties, while others like to reach for the deep cuts. Regarding costume ideas that start with "K", Krampus is likely not the first to come to mind—or even the second or third. But if you like unique costumes, this Krampus costume is for you! You can also bring it out for Christmas to scare the kids straight.
6. Kim Possible Costumes
| Kim Possible Costume | Plus Size Kim Possible Costume |
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She's your basic, average girl, and she's here to save the world. If Kim Possible was one of your favorite shows growing up, you'd be happy to see there are Kim Possible costumes! Dress as the leading lady herself, or make it a couples' or group costume by adding characters like Shego and Dr. Drakken. Danger or trouble, she's there on the double!
7. King Kong Costumes
We already talked about king costumes, but not in the animal kingdom! King Kong is one of the greatest movie monsters of all time. We were hooked after his famous scene holding a woman from the top of the Empire State Building. (Did you know that it first happened in 1933?) Dress as the great ape himself, or pair up with Anne Darrow or Godzilla for a killer combo.
8. Kermit the Frog Costumes
| Adult Kermit Costume | Child Kermit Costume | Tuxedo Kermit |
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Hi ho, Kermit the frog here! Kermit is one of the most beloved muppets and a classic costume idea that's instantly recognizable. Whether you recognize him from the Muppet Show, any of the Muppet movies, or even Sesame Street, kids and adults alike will be delighted to meet someone in a Kermit costume. The only way to improve this Kermit costume is to play the banjo and sing "Rainbow Connection".
9. Kangaroo Costumes
There's a good chance that the first costume idea that came to mind when you heard the letter "K" was a kangaroo. These Australian animals feel like they're featured in every alphabet graphic known to man! However, we must admire them for their powerful legs and ever-adorable pouch babies.
10. Karate Kid Costumes
| Adult Daniel San Costume | Kids' Daniel San Costume | Child Cobra Kai Costume | Adult Cobra Kai Costume |
Karate costumes are already great ideas that start with "K", but we especially love the 80s nostalgia of The Karate Kid. Do you prefer Daniel San in his white karate uniform or the bad boys in their black cobra kai outfits? This is a great costume idea to share with friends and family! Also, never forget—wax on, wax off.
11. Kristoff Costumes
Disney's Frozen may have two leading ladies, but we can't forget Kristoff! This humble ice farmer has an adorable reindeer sidekick, and he falls in love with our heroine, Anna. This gives you a few options if you're bringing a plus one. You can dress as Kristoff with a friend or significant other dressed as Anna or go the Sven route, too.
12. Ketchup Costumes
| Adult Ketchup Bottle | Kids' Ketchup Bottle |
Do you want to wear a silly costume without the pressure of being a well-known character? A ketchup bottle may be the perfect costume idea that starts with "K" for you! These easy costumes are worn tunic-style and simply worn over whatever clothing you have on underneath. They're relatively comfortable and easy to take off and put on, so you can slip out of them for the drive home.
13. Khal Drogo Costumes
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Dudes with long hair—we have the perfect costume for you. Out of every character that starts with "K", Khal Drogo must have the longest hair! This nomadic warrior from The Game of Thrones may have seemed intimidating initially, but he's a total sweetie to his beloved. If you don't have the hair for it but still want to dress as Khal Drogo, that's ok, too!
14. Knuckles Costumes
| Sonic 2 Knuckles Costume | Kids' Knuckles Costume |
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Do you have your heart set on wearing a video game character costume? Never fear because Knuckles is here! This red echidna is known for his strength, in contrast to Sonic's speed. (We guess that's why they call him Knuckles!) Bring along friends dressed as Sonic and Tails for your next costumed adventure.
15. Koala Costumes
| Adult Inflatable Koala Costume | Kids' Koala Costume | Toddler Dapper Koala |
If one well-known Australian animal that starts with "K" wasn't enough, how about two? We take back what we said about the alphabet and kangaroos—there's always space for a koala here! Unless you're going the inflatable costume route, these koala costumes are very warm and fuzzy, perfect for chilly fall trick-or-treating.
16. Killer Clown Costumes
| Adult Killer Klowns from Outer Space Slim | Kids' Scary Clown Costume | Chlid Crazy-Eyed Clown | Women's Sinister Clown |
Normally, we don't count costume ideas if you stick a random "K"-letter adjective in front just to make it fit the theme. (Kooky candies, keen scientists, etc.) However, the one exception for us is killer clowns. They're so engrained in Halloween costume culture that they nearly outnumber regular circus clowns! There's even a movie about Killer Klowns from Outer Space! Pick any evil clown costume you like, whether it's a famous horror movie character or a ridiculously cool costume—you'll get a few screams either way.
17. Kirby Costumes
| Adult Inflatable Kirby Costume | Kids' Inflatable Kirby Costume |
Arguably the cutest character in this list, Kirby is a well-loved Nintendo character. He has several of his own games but is also prominently featured as a fighter in Super Smash Bros. (If you're prone to falling off the stage, you probably enjoy using Kirby.) These inflatable Kirby costumes are hilarious and cute, perfect for our round friend.
Hopefully, we kickstarted your creativity with these letter "K" costume ideas. What word came to mind first for you? Are there any letter "K" characters you think we're missing? We'd love to hear from you in the comments! If you're curious to see more ideas across the entire alphabet, check out these costume ideas by letter!
