Baby Girl & First Birthday Dresses
Make her big day unforgettable with THA Dressing's handmade baby and toddler birthday dresses. From first-birthday and cake-smash outfits to dresses for 1, 2 and 3-year-old girls, each piece is crafted from premium tulle, satin and soft cotton linings for all-day comfort. Whether you're planning a princess party, a milestone photoshoot or a family celebration, our birthday dresses blend timeless elegance with the playful charm little ones love.
Loved by 360+ families and rated 4.9 stars, every order ships the next business day from Lafayette, California and arrives within 1–3 business days in the US, with 30-day returns. Find the perfect birthday dress below — and add a matching headband to complete the look.
Shop by age: Baby 0–24 months · First birthday (1Y) · Toddler birthday dresses 2T–5T
Party themes: Fairy first birthday dresses
How to Choose a First Birthday Dress
A first birthday dress should look special in photos and still be comfortable for a busy one-year-old. Look for a soft cotton lining, a full skirt that sits nicely when she sits or crawls, and a sleeveless or short-sleeve bodice so she can move her arms freely. Tulle tutu skirts, satin and lace appliqués are classic looks for first birthday parties and cake smash photos.
First Birthday Dress Size Guide
Most one-year-olds wear our 9–12 M or 1Y size, and some wear 12–18 M. Choose by her height and chest measurement rather than age alone. If she is between sizes, or you are buying a few weeks before the party, pick the larger size. Every product page shows the sizes in stock and links to our size guide.
Cake Smash and Photo Shoot Dresses
For a cake smash, choose a dress with a fluffy skirt and a simple neckline so the cake and her smile stay the focus. White dresses with 3D flowers, like the Elena dress, and bright tulle tutus, like the Diana fuchsia dress, photograph beautifully against balloons and backdrops. White, soft pink and champagne are classic first birthday colors.
First Birthday Outfits and Baby Dress Sets
Our baby dresses and baby dress sets are made for little ones from 0 to 24 months and make an easy first birthday outfit. Most of our dresses come with a matching hair accessory, so her look is ready for the party.
Infant Birthday Dresses (0–12 Months)
For a half birthday or a monthly milestone photo, our baby sizes start at 0–3 months, with soft linings and gentle fabrics for infants. For the youngest babies, a sleeveless bodice with a short, full skirt is the most comfortable choice.
Fall and Winter First Birthday Outfits
For a birthday in the colder months, pair a sleeveless dress with a cardigan and tights, or choose a long-sleeve style such as the Penny sequin dress. Rich colors such as fuchsia, emerald and red feel festive from Thanksgiving through New Year.
Toddler Birthday Dresses (2T–5T)
For a second or third birthday, our toddler birthday dresses in sizes 2T to 5T have their own collection, with tulle, satin and brocade styles for 2- to 5-year-olds.
When to Order
Orders ship the next business day from Lafayette, California and arrive within 1–3 business days in the US. Standard US shipping is free on orders over $50, faster Express and 1-Day options are available at checkout, and unworn items with original tags can be returned within 30 days of delivery for store credit.