There are tons of occasions for people to wear costumes outside of Halloween. You can wear costumes for cosplay at conventions, charity runs and events, or costumed birthday parties. Some themed birthday parties go as far as picking an idea, such as a letter so that you can have some fun and interesting costumed results. If you're considering attending a letter party or another similarly-themed event, you may need ideas to help you get started! Let's look at costume ideas that start with the letter "M" without further ado.
1. Minecraft Costumes
If you show up to a party in a blocky, pixellated costume, chances are that most everyone will know that you're dressing as a character or creature from Minecraft. This iconic game allows you to play with the world like virtual LEGOs, gathering materials and re-forming them as various structures.
2. Mermaid Costumes
Be a beautiful siren of the sea in a mermaid costume! While you could dress as an iconic mermaid, like Princess Ariel, there's something to be said about a classic mermaid from mythology. They're much more menacing in older sea tales than cartoons will admit!
3. Mario Costumes
It's a-me, Mario! One of the most classic characters starting with "M", Mario is definitely a crowd-pleaser. Most people can identify Mario at a glance, often with fond memories of their favorite Mario game or movie. As a bonus, this letter "M" costume even comes with the letter on his hat!
4. Michael Myers Costumes
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We love an unexpected excuse to wear a Michael Myers costume. (Do we get double points for two "M"s?) Surprise your fellow partygoers with this costume for the letter "M"! It's going to be a scream.
5. Minion Costumes
We hope your banana game is on point if you wear a minion costume for the letter "M"! These bumbling little helpers have their own unique language and an apparent love for the yellow fruit. Gather a couple of friends to attend as additional minions, and you'll be unstoppable!
6. Moana Costumes
No one knows how far you'll go to have the perfect costume for the letter "M". Moana is a favorable choice and a newer Disney Princess favorite! Don't forget a necklace and a wig if you want to complete the look. (Boat and oar not included!)
7. M&M Costumes
Another costume with a letter "M" on it? You betcha! M&M's candies are incredibly iconic, making them the perfect choice for a letter party costume. No one will question you for stretching the truth about how relevant your letter "M" costume is!
8. Mad Hatter Costumes
We're all mad here for Mad Hatter costumes. Probably one of the most fun and versatile costumes for the letter "M", there are so many costumes for men, women, and children. You can even pull together a closet cosplay with a few accessories. Of course, a quirky top hat is a must!
9. Mummy Costumes
If you're a fan of classic horror, fear not! Mummy costumes are where it's at. While everyone else is running around the party in sexy costumes or dressed as pop culture characters, you're chilling comfortably in strips of fabric from head to toe.
10. Mickey Mouse Costumes
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Not to detract from famous characters that start with the letter "M", is anyone more universal than Mickey Mouse? (We'd like to argue no!) Also, Minnie Mouse costumes work just as well as Mickey, making for a great couples' letter party costume!
11. Medusa Costumes
Make it mythical with a Medusa costume! We love learning about all the creative creatures from mythology, so history and cryptid buffs may gravitate toward the monstrous Medusa. Wear lots of snake-themed jewelry, and you'll look like this Gregian gorgon in no time.
12. Maleficent Costumes
It appears that we're on a villainous streak! Maleficent is one of our favorite Disney villains of all time. (The ability to turn into a fire-breathing dragon is the coolest!) Whether you prefer the classic Maleficent or the Angelina Jolie version, there's a Maleficent costume ready for you.
13. Monkey Costumes
Animal costumes are some of the most comfortable, especially animal onesie costumes. So, why not get a fun monkey costume for the letter "M"? The fabric is soft and warm, perfect for parties when it's chilly outside.
14. Musician Costumes
Dressing as a famous musician can easily fulfill your requirement to dress as something that starts with "M". However, several famous musicians have names that begin with "M", from Madonna and Michael Jackson to Marshmello. No one can accuse you of taking the easy way out with these musician costumes!
15. Mulan Costumes
Another Disney Princess? Of course! Mulan is one of our favorites, and she has an adorable dragon companion to boot. The only thing that would make this "M" costume better would be a matching matchmaker costume to go with it!
16. Musketeer Costumes
Do you love historical costumes that give you an excuse to wield a sword? Look no further than a musketeer costume! Granted, it helps to have an excellent goatee and a French accent.
17. Money Costumes
They say that you are what you eat, so what if you could be what you wear? Obviously, we'd pick a money costume if it could make us richer. It's also a costume idea that starts with "M", making it the perfect one!
18. Master Chief Costumes
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Do you really love video games? There are video game characters that start with "M"! Master Chief is the main protagonist of the Halo franchise, and thankfully, you can find Master Chief costumes that are easy enough to wear. (Although you can go full Halo armor if you want to!) We're sure that you'll have a blast.
19. Mushroom Costumes
Mushrooms have grown in popularity, from mushroom foraging to vegan mushroom recipes. If you want to prove that you're a fun-gi, go to your next letter part dressed as a mushroom for the letter "M"! If you're sneaky, you can double up and be a toadstool, too.
20. Merida Costumes
Yet another Disney Princess? (Disney must love princesses with names that start with "M".) This fiery red-headed princess is a ton of fun, with a beautiful green gown and the chance to have a bow and arrow prop.
21. Magician Costumes
We hope you have a few card tricks up your sleeve for this magician costume! The key here is to wear a back cape and suit with a pop of red and white. Don't forget a top hat! (How else should a magician store their tricks?)
22. Mega Man Costumes
Dress as a blast from the past with this classic Mega Man costume! In the right crowd of video game geeks, they'll appreciate this letter "M" costume. At the same time, it may seem too niche for some folks. Dress as what you love! You'll have a chance to chat at the party about one of your favorite video game characters.
23. Milk Costumes
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No one will question whether you understood the assignment when you arrive in this milk carton costume at the party. Undeniably a representative for the letter "M", this gender-neutral costume is silly when worn by anyone for any occasion.
24. Mike Wazowski Costumes
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Why dress like any monster when you could be Mike Wazowski from Monsters, Inc.? This wonderfully round little monster has some great lines in the Pixar franchise and a winning smile to boot. You'll be the life of the party!
25. Mermaid Man Costumes
The world of SpongeBob SquarePants is filled to the brim with peculiar characters. This includes Mermaid Man, a semi-retired superhero who is really showing his age. The character is a spoof on classic superheroes like Aquaman and Batman.
26. Mrs. and Mr. Potato Head Costumes
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The classic potato head toy is the perfect couple's costume for the letter "M". However, don't be afraid to fly solo in this one. It's instantly recognizable because of its iconic nature and inclusion as a character in the Toy Story franchise.
27. Merlin Costumes
Do you have an impressive beard, or would you like to wear one as part of your costume? Step into a Merlin costume and feel simply magical! No one will doubt you and your wizardly powers.
28. Mater Costumes
Lightning McQueen may have been the main character in Cars, but Mater stole our hearts. (The breakout character even got to star in a series of shorts!) This one is definitely more for the kids, but adults shouldn't shy away from the character if they love Mater, too!
29. Mail Carrier Costumes
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Do you want to be a woman or a man in uniform? Try on a mail carrier costume! Mailmen and women are the backbone of our postal service, and we love to see our packages and letters arrive on time. Ironically, you're probably getting this costume in the mail, too.
30. Macaroni and Cheese Costumes
At one point in your childhood, macaroni and cheese was probably one of your favorite food groups. Maybe you never had a post-toddler break-up. Macaroni and cheese is one of those comfort foods that hardly loses its luster, which is why it also makes a great costume!
31. Mother Gothel Costumes
Mother knows best! This Disney villain costume is a little newer than some classic villains, but that doesn't make her any less evil! It's bound to be a hit with a younger crowd who may be more familiar with Disney's Tangled.
32. Ms. Marvel Costumes
Any superhero fan will be glad to know that there are even superheroes with names that start with "M". For example, we have Ms. Marvel, who also has a few character designs available for cosplay. If you love villains, maybe Magneto is more your speed.
33. Megara Costumes
She may not officially be a Disney Princess, but she's practically a goddess now after her relationship with Hercules. Megara was a breath of fresh air for some, as she was more than willing to speak her mind. Also, the Muses would make an excellent letter "M" group costume from this same movie!
34. Macho Man Costumes
Any costume that gives us an excuse to have snacks on our person all night is good enough for us! Snap into a Slim Jim at the party with this Macho Man costume. Oh yeah!
35. Mary Poppins Costumes
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This costume is supercalifragilisticexpialidocious! (Even though the sound of it is something quite atrocious.) You may want to familiarize yourself with some famous Mary Poppins show tunes. People are bound to ask you about it!
36. Marilyn Monroe Costumes
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Anyone who loves vintage celebrity icons will adore this Marilyn Monroe costume idea. Made famous in The Seven Year Itch, Marilyn's white halter dress is unmistakable. If you intend to try and recreate the scene, you'll need a good fan and some Photoshop magic.
37. Marshall Costumes
If young children are attending a letter party, maybe Marshall would be an idea for them for the letter "M". This Paw Patrol character is a fire-fighting Dalmatian with a red jacket and hat. People familiar with the franchise will spot this character in no time!
38. Mad Scientist Costumes
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Who doesn't want to rock a white lab coat once in a while? Mad scientist costumes are tons of fun to wear, allowing you to play with your makeup and hair. Do you want it to look like an experiment blew up in your face? Maybe you got slimed! It's all entirely up to you.
We surely didn't cover every single letter "M" costume idea, but we did touch on quite a few! If you're still searching, check out all of our costume guides! What's your favorite letter costume idea? Is there a letter of the alphabet that's giving you grief? Share your thoughts with us in the comment section! But, most of all, don't forget to have fun at your next costume party.
See our other ideas for costumes by letter.
