20 First Birthday Outfits Just as Special as Your Tot
Baby is turning one, which is a one-derful excuse to buy them a celebratory ensemble. A first birthday outfit cues everyone in that it’s their big day. Plus, it’ll make those cake smash photos even sweeter! The best birthday outfits for boys and girls take full advantage of the latest trends—for Instagram, yes, but also for you to reminisce about down the road. Of course, they should also speak to the occasion, like the theme or formality of your child’s first birthday party. For ample first birthday outfit inspiration, keep on scrolling! We’ve made it easy to shop the cutest ideas on the market, from super-sweet Minnie Mouse and Mickey Mouse first birthday outfits to an ultra-trendy mermaid first birthday outfit.
These baby boy first birthday outfits pay tribute to the most popular boys’ first birthday party themes. (Plenty of them are also unisex!) Whether you’re looking for something funny or formal, we’ve found cute clothing for your soon-to-be toddler.
Mickey Mouse may just be the ultimate emblem of family fun, so this Mickey Mouse first birthday outfit will definitely set the right tone for baby’s party. And how cute is that mouse ear beanie? Cute enough to keep wearing all winter long, that’s for sure!
Material: 60% cotton/40% polyester | Cleaning instructions: Machine wash
Is there a certain television show about a lovable puppy that everyone in your house can’t get enough of? If so (join the club!), this Bluey first birthday outfit is a must. It’s got your favorite furry friend, and can even be personalized!
Material: Cotton | Cleaning instructions: Machine wash delicate, line dry.
Vroom! Vroom! Your little speedster will be cute as can be in this romper (available in red, black and navy) at a race car-themed birthday party! Bonus: Reviewers love the cozy fabric!
Material: Cotton blend | Cleaning instructions: Hand wash, dry flat
Calling all autumn babies! Dress your little pumpkin up in this autumnal set that comes with a pumpkin-themed onesie with an orange gingham “one,” a bowtie, cozy sweats and the cutest beanie they can wear all season—to the pumpkin patch and beyond!
Material: Cotton blend | Cleaning instructions: Hand wash only
Having a dinosaur-themed birthday party? With an adorably fierce bowtie onesie, a suspender dino tail—er, pants—and even a crown, this dinosaur first birthday outfit is bound to cause an up-roar of giggles and smiles.
Material: 85% cotton/15% polyester | Cleaning instructions: Machine wash
Here’s a more versatile (and dressy) option your little one can wear well beyond their birthday. The set comes with a stylish plaid button-down, khaki pants, a bowtie and suspenders—because there’s nothing quite like a baby in suspenders!
Material: Cotton | Cleaning instructions: Machine wash, tumble dry
We don’t know what it is about a baby in rustic plaid, but lumberjack-inspired first birthday outfits are an ever-popular choice! This super-soft onesie with buffalo plaid trompe l'oeil suspenders and a bright red tie—plus matching leg warmers and a plush ax toy—makes an excellent ensemble for a fall or winter birthday.
Material: Cotton | Cleaning instructions: Hand wash
Planning a monster bash? Pay tribute to your lovable little monster with this sweet, quirky first birthday cake smash gear. Everyone will love the adorable tie and suspenders (they’re one well-dressed monster!) and you can even get the hat or shirt personalized with baby’s name.
Material: N/A | Cleaning instructions: Remove bowtie and hand wash, dry flat
This Winnie the Pooh first birthday outfit will give parents and children alike all the feels. There’s a reason this character has been beloved for all these years—he’s the perfect silly birthday bear, just like your little guy!
Material: 60% cotton/40% polyester | Cleaning instructions: Machine wash
For a more classic outfit that may even be passed down to other generations (if it doesn’t get covered in too much cake!), this adorable seersucker romper is a keeper. Its gingham cupcake and personalized name embroidery is oh so sweet, you’ll never want to get rid of it.
Material: Cotton | Cleaning instructions: N/A
Looking for dresses, tutus and headbands? We’ve found plenty, plus other adorable details that’ll steal your heart. There’s something for all the cutest first birthday party themes, as well as some formal, wear-again options we love.
Baby’s only one once, so shout it from the rooftops! This sparkly “one” first birthday tutu outfit will surely make them the center of attention. That’s in part because it comes with a fancy matching headwrap!
Material: 100% cotton (bodysuit); 100% polyester (tutu); 100% cotton (head wrap) | Cleaning instructions: Machine wash, line dry.
Can you ever have too many ruffles? Treat your newly minted tot like royalty with pink frills and polka dot sequins, on a dress that will be great for dress-up even after the big day. How cute!
Material: 90% cotton/10% polyester | Cleaning instructions: Hand wash
A boho first birthday outfit is perfect for any budding flower child. The party will be filled with peace, love and happiness with the birthday girl dressed in this adorable Bohemian onesie, multicolored tutu and sunshine crown.
Material: 95% cotton/5% polyester | Cleaning instructions: Hand wash only
Head under the sea for your birthday celebration and dress the guest of honor in this mermaid first birthday outfit. The fishtail bloomers are a great option for those who want to skip the tutu, while the iridescent headband will still add a bit of girly flair. Plus, the ruffles on the sleeves of the onesie are extra adorable!
Material: Cotton | Cleaning instructions: Hand wash only
It’ll be a berry good party with your girl in this sweet strawberry first birthday outfit! The pink ribbed onesie will keep her soft and cozy while the strawberry embroidered tulle and headband will add some festive and fruity fun!
Material: Cotton blend | Cleaning instructions: Machine wash
Disney lovers, this one’s for you—especially if a birthday trip to Magic Kingdom is in the works! This Minnie Mouse-inspired ensemble comes with a pretty red polka dot skirt and a mouse ear headband with the iconic red bow.
Material: 100% polyester | Cleaning instructions: Machine wash cool. Line dry.
You’ve been a busy bee this past year, and you and your family deserve to celebrate! Everyone will be abuzz about this bee-themed set complete with a yellow and black onesie, a tulle tutu with a bow and a matching headband.
Material: Cotton and tulle | Cleaning instructions: Hand wash only
For a more casual yet still completely festive look, go for this adorable pink-and-black onesie and leggings set that comes with a birthday bib (get ready for that smash cake!) and the cutest little crown. Bonus: Those leggings can go straight into baby’s outfit rotation!
Material: 100% cotton | Cleaning instructions: Machine wash, tumble dry
It’s been quite a year, and to celebrate, all the shimmer is in order! This sparkly set comes with a graphic bodysuit, a beautiful tutu skirt and a shiny bow (you can buy them individually as well) that will make your kiddo feel like the center of the universe!
Material: 100% cotton (bodysuit); tulle (tutu) | Cleaning instructions: Turn inside out, machine wash, tumble dry low
Not into graphic tees and baby bodysuits? Not a problem! For a more formal birthday bash, try this pretty pinafore first birthday dress with a playful cake pattern your child will drool over.
Material: 100% cotton | Cleaning instructions: N/A
You have a lot on your plate when it comes to planning baby’s first birthday party. So we decided to make it easy for you when it comes to finding the perfect first birthday outfit for your little one’s big day! We narrowed down some of the most fun and festive birthday outfits out there, no matter the theme of your party. When selecting the outfits, we considered what’s on trend, what people are searching for, the size and the material. We also made sure to read user reviews to see what real consumers have experienced when buying these outfits, and didn’t consider anything with less than an average four-star rating.
Interested in learning more about our editorial process? Read about how our team develops and reviews all articles here.
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