20 First Birthday Outfits Just as Special as Your Tot
It’s your baby’s very first birthday—time to celebrate! An adorable outfit not only lets everyone know who the guest of honor is, it also makes those cake‑smash photos that much sweeter. The most memorable first‑birthday outfits embrace current trends, complement the party’s theme and are cute enough to look back on years later. Whether you’re planning a Mickey Mouse bash or a mermaid party—or you’re after a dressy look that can be worn again—we’ve gathered the sweetest picks. Prepare to swoon!
First Birthday Outfits for Boys
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.
Dinosaur first birthday outfit
AWIBMK Dinosaur Wild First Birthday Outfit
Hosting a dinosaur party? This playful ensemble features a bow‑tie bodysuit, suspenders with a dino tail and a cute crown.
Material: 85% cotton/15% polyester | Cleaning instructions: Machine wash
Mickey Mouse first birthday outfit
Disney Mickey Mouse 1st Birthday 3‑Piece Outfit
This Mickey‑themed set is perfect for setting a fun, family‑friendly mood. The outfit includes a shirt, shorts and a cozy mouse‑ear hat, so your little one stays warm all winter long.
Material: 60% cotton/40% polyester | Cleaning instructions: Machine wash
Racecar first birthday outfit
2TroubleBoys Racecar Outfit
Rev your engines with this romper, available in red, black and navy. It’s perfect for a car‑themed party, and parents rave about the soft fabric.
Material: Cotton blend | Cleaning instructions: Hand wash; lay flat to dry
Bluey first birthday outfit
Almira Custom Shirt Bluey Birthday Shirt
If your household loves the animated series Bluey, this outfit is a must. It features their favorite canine character and can be customized with your child’s name.
Material: Cotton | Cleaning instructions: Gentle machine wash, line dry
Dressy first birthday outfit
Andy & Evan Infant Boys Button‑Down Plaid Shirt Set
If you’d like a dressier option that can be worn after the party, this set is perfect. It includes a plaid shirt, khaki pants, bow tie and suspenders—everything needed for a stylish celebration.
Material: Cotton | Cleaning instructions: Machine wash; tumble dry
Winnie the Pooh birthday outfit
Disney Winnie the Pooh Boys’ 1st Birthday Bodysuit
Winnie the Pooh has been beloved for generations, and this outfit channels the classic character’s charm. Your little one will look like the silliest birthday bear in the best way.
Material: 60% cotton/40% polyester | Cleaning instructions: Machine wash
Lumberjack first birthday outfit
Birdy Boutique 1st Birthday Boy Lumberjack Outfit
This rustic plaid onesie comes with printed suspenders, a bright red tie, matching leg warmers and even a plush axe toy—perfect for a cozy fall or winter party.
Material: Cotton | Cleaning instructions: Hand wash
Monster first birthday outfit
Crafting by the Cape Little Monster Baby Boy Cake Smash Outfit
A quirky monster theme calls for a fun outfit. This set includes a colorful tie and suspenders, and you can personalize the hat or shirt. It’s just right for a messy cake smash.
Material: N/A | Cleaning instructions: Remove bow tie; hand wash and lay flat to dry
Seersucker first birthday outfit
Tips Design Baby’s First Birthday Outfit
Looking for something timeless that could even become an heirloom? This seersucker romper features a gingham cupcake and optional name embroidery.
Material: Cotton | Cleaning instructions: Not specified
Pumpkin first birthday outfit
Viworld Birthday Pumpkin
For an autumn celebration, this pumpkin outfit is ideal. The plaid onesie features an orange gingham “one,” and the set includes a bow tie, comfy pants and a matching beanie to keep little ones warm.
Material: Cotton blend | Cleaning instructions: Hand wash only
First birthday outfits for girls
From tutus and headbands to ruffles and prints, these outfits will steal your heart. They cover all the most popular themes and include dressier pieces that can be worn again.
Bee first birthday outfit
HAPPYMA Bee First Birthday Outfit
After a busy year, celebrate with a bee‑themed set. It includes a black and yellow bodysuit, a tulle tutu with a bow and a matching headband.
Material: Cotton and tulle | Cleaning instructions: Hand wash only
Strawberry first birthday outfit
GRNSHTS Strawberry First Birthday Outfit
Celebrate with a berry‑sweet outfit: a ribbed pink onesie paired with a strawberry‑embroidered tulle skirt and a matching headband.
Material: Cotton blend | Cleaning instructions: Machine wash
Sparkly first birthday outfit
Baby Aspen My First Birthday Bodysuit, Tutu and Head Wrap Set
Make a statement with this shimmering “one” tutu set. The look is completed with a matching head wrap to ensure all eyes are on the birthday girl.
Material: 100% cotton bodysuit; 100% polyester tutu; 100% cotton head wrap | Cleaning instructions: Machine wash; line dry
Ruffled first birthday outfit
IMEKIS 1st Birthday Outfit Princess Dress
You can never have too many ruffles. This pink dress, covered in frills and dot sequins, is perfect for dress‑up long after the party.
Material: 90% cotton/10% polyester | Cleaning instructions: Hand wash
Mermaid first birthday outfit
GRNSHTS Mermaid First Birthday Outfit
Dive under the sea with this mermaid outfit. The fish‑tail bloomers are perfect for those who prefer no tutu, while the iridescent headband and ruffled sleeves add extra flair.
Material: Cotton | Cleaning instructions: Hand wash only
Minnie Mouse first birthday outfit
IBTOM Castle Birthday Girl Set
Planning a Disney trip or just love Minnie? This outfit comes with a red polka dot skirt and a mouse‑ear headband topped with a bow.
Material: 100% polyester | Cleaning instructions: Machine wash cool; line dry
First birthday dress
Worthy Threads Pinafore Dress in Cakes
For a formal party, choose this pinafore dress with a playful cake pattern—no graphic tees or bodysuits required.
Material: 100% cotton | Cleaning instructions: Not specified
Comfortable first birthday outfit
Hudson Baby Infant Girl Birthday Boxed Giftset
For a casual yet festive look, pick this pink‑and‑black onesie and leggings set. It comes with a birthday bib and a tiny crown, and the leggings can be worn any day.
Material: 100% cotton | Cleaning instructions: Machine wash; tumble dry
First trip around the sun birthday outfit
Payton’s Pink Boutique Around the Sun Birthday Outfit
It’s been quite a year—celebrate with sparkle! This set features a graphic bodysuit, tulle skirt and shiny bow, sold as a set or separately.
Material: 100% cotton bodysuit; tulle tutu | Cleaning instructions: Turn inside out; machine wash; tumble dry low
Boho first birthday outfit
IDOPIP Boho Rainbow Sun 1st Birthday Outfit
For a free‑spirited feel, choose this Bohemian set featuring a printed onesie, a multicolored tutu and a sunshine crown.
Material: 95% cotton/5% polyester | Cleaning instructions: Hand wash only
How we selected these outfits
We know planning a first birthday party can be a lot. To make choosing an outfit easy, we curated a list of fun and festive options that work for any theme. In our search we considered current trends, popular searches, size range and fabric quality. We also read reviews from real parents and excluded any outfits with less than an average four‑star rating.
