A birthday is one of the most special days in a little girl’s life — and the right dress makes it even more magical. At Itty Bitty, our baby girl birthday dress UK collection brings together the most beautiful, boutique-quality birthday dresses for baby girls aged 0–3 years. Whether you are celebrating a first birthday, a second birthday, or any occasion in between, we have the perfect dress to make your little one feel like the star of the show.
Baby Girl 1st Birthday Dresses
The first birthday is a milestone like no other — and it deserves a dress that is equally unforgettable. Our 1st birthday dresses for baby girls range from delicate tulle ball gowns and lace-trimmed smock dresses to bold glitter styles and personalised sash designs. Popular choices include ivory and white dresses for a classic look, blush pink and rose gold for a modern aesthetic, and bold jewel tones for a statement entrance.
For cake smash sessions, choose a dress with a full tulle skirt that photographs beautifully and can be wiped clean easily. For a birthday party, a velvet or satin-trimmed dress in a deeper colour will stand up to an active day while still looking stunning in every photo.
Baby Girl 2nd Birthday Dresses
By the second birthday, little girls often have opinions about what they want to wear — and the answer is usually something sparkly, twirly, or both. Our second birthday dress range includes tutu dresses, glitter party dresses, and beautiful smock dresses in seasonal colours. Pair with our baby boots or baby sandals for a complete birthday outfit.
Baby Girl Party Dresses for Every Occasion
Beyond birthdays, our party dress range covers every celebration in a baby girl’s first few years. Christening dresses in ivory and white lace. Wedding guest dresses in florals, pastels, and classic navy. Christmas party dresses in velvet, tartan, and festive red. Whatever the occasion, Itty Bitty has a boutique dress that will make your little one the best-dressed guest in the room.
Browse our full baby girl dresses collection, or explore our christening dresses and special occasion dresses for more inspiration.
Birthday Dress Buying Guide
Choose the right fabric for the occasion. Tulle and organza create the most dramatic, photogenic silhouettes for birthday parties and cake smash sessions. Velvet and satin are more practical for longer events where the dress needs to hold up through a full day of celebrations. Cotton-lined bodices are essential for comfort — always check that any structured or embellished dress has a soft cotton lining against the skin.
Consider the season. Summer birthday dresses can be lighter fabrics with shorter sleeves or sleeveless designs. Autumn and winter birthday dresses benefit from a long-sleeve bodysuit underneath, or a matching cardigan or bolero jacket over the top. See our autumn winter baby girl dresses guide for seasonal styling tips.
Size up for comfort. Birthday dresses are often worn for a full day of activity — crawling, walking, dancing, and cake eating. Size up by one size to ensure your little one has plenty of room to move freely without the dress feeling restrictive.
Birthday Dress Size Guide
| Age | Chest (cm) | Height (cm) | Recommended Size |
|---|---|---|---|
| 0–3 months | 40–43 | 50–62 | 0–3M |
| 3–6 months | 43–46 | 62–68 | 3–6M |
| 6–12 months | 46–49 | 68–80 | 6–12M |
| 12–18 months | 49–52 | 80–86 | 12–18M |
| 18–24 months | 52–54 | 86–92 | 18–24M |
| 2–3 years | 54–57 | 92–104 | 2–3Y |
See our full baby clothes sizes guide for complete measurements and European size conversions.
What dress is best for a 1st birthday party?
A tulle or organza dress in a light colour — white, ivory, blush pink, or gold — photographs beautifully and creates the most memorable birthday images. Choose a cotton-lined bodice for comfort and a full skirt for that classic birthday dress silhouette.
What should a baby girl wear for a cake smash?
A full tulle skirt dress in white or a pastel colour is the most popular choice for cake smash sessions. The tulle photographs beautifully and the light colour shows off the cake colours. Choose a dress you are happy to get messy — most tulle can be hand-washed or gently machine washed.
Do you offer personalised birthday dresses?
We stock a range of birthday dresses with personalisation options including sash designs, number appliqués, and embroidered name details. Check individual product listings for personalisation availability.