Shop / Lil' Toddler Tees / 4th Birthday Mermaid Shirt, Four and Fabulous Shirt, Girls 4th Birthday Shirt, Mermaid Birthday Tee, Under the Sea Birthday Outfit

4th Birthday Mermaid Shirt, Four and Fabulous Shirt, Girls 4th Birthday Shirt, Mermaid Birthday Tee, Under the Sea Birthday Outfit

🧜♀️ FOUR & FABULOUS! 🌊 She’s turning FOUR—and making waves while she does it! Celebrate her big day...
★★★★★ New — First Reviews Coming Soon
$25.95
Size: 2T
Color: White
Printed by our own team
Ships in 3–5 business days
Easy 30-day exchanges
  • Mid-weight cotton that holds shape wash after wash
  • Relaxed toddler fit — room to move, room to grow
  • Printed and quality-checked by our own team
Product details

🧜♀️ FOUR & FABULOUS! 🌊

She’s turning FOUR—and making waves while she does it!

Celebrate her big day with this adorable 4th birthday mermaid shirt, featuring a dreamy mermaid, tropical palms, ocean waves, coral, seashells and starfish in a bright coastal color palette.

The playful “Four & Fabulous” saying makes this an extra-cute birthday outfit for the little girl who loves mermaids, beaches and everything under the sea.

🌴 PERFECT FOR HER 4TH BIRTHDAY

Made for all the magical birthday moments:

• Mermaid birthday parties
• Under-the-sea birthday themes
• 4th birthday celebrations
• Beach and pool parties
• Aquarium birthday adventures
• Birthday photoshoots
• Cake and presents
• Family birthday outings
• Fourth birthday gifts

🩷 FOUR, FABULOUS & MERMAID OBSESSED

The large FOUR lettering immediately shows off her milestone age, while the mermaid and ocean artwork makes it perfect for a coordinated mermaid birthday theme.

Pair it with denim shorts, a tutu, skirt, leggings, sandals, a big birthday bow or her favorite sparkly accessories.

🌊 UNDER-THE-SEA BIRTHDAY STYLE

Coral pink, aqua and turquoise give this shirt a bright beachy look that's easy to coordinate with popular mermaid party decorations.

It's an especially cute choice for a mermaid 4th birthday party, summer birthday, pool party or tropical celebration.

📸 MADE FOR BIRTHDAY PHOTOS

From her first birthday-morning picture to blowing out four candles, this tee creates an easy photo-ready outfit she'll immediately recognize as her special birthday shirt.

🎁 4TH BIRTHDAY GIFT FOR GIRLS

Shopping for a little mermaid turning four? This Four & Fabulous mermaid shirt makes a sweet fourth birthday gift for daughters, granddaughters, nieces and mermaid-loving birthday girls.

Four. Fabulous. And ready to make some waves. 🧜♀️🌊🩷

Shipping and delivery
Most orders ship in 3–5 business days.
Returns & refunds
Easy 30-day exchanges on unworn items.
Boutique kids clothing store interior
Printed In-House. Not Outsourced.

Our Story

Printed In-House, Made With Care

Lil Croptops started with a simple frustration: kids' graphic tees that faded after three washes, felt like cardboard, and were printed who-knows-where. So we bought a press, learned the craft, and started making them ourselves.

Printed In-House

Every garment is designed, printed, and packed in our studio. No third-party print farms.

Made With Care

We choose soft, durable cottons and test every graphic for comfort.

Small Batches

We print in small runs so designs stay fresh and waste stays low.

Read Our Story →
Warm boutique workspace with apparel and printing supplies

Printed In-House, Made With Care

Why We Print In-House.

We started Lil Croptops because we were tired of ordering cute designs online and getting prints that cracked after two washes. So we brought printing in-house — every onesie and tee is produced and checked by our own team, not shipped out to a third party. It’s slower. It’s also the only way we’d put our name on it.
Read Our Story →

Parents Are Talking

What Families Are Saying

Real reviews from real parents. (We’ll add more as they roll in.)
★★★★★
The quality exceeded my expectations! The shirt was so soft and absolutely adorable.
Sarah M.
Austin, TX · Best Day Ever Toddler Tee
★★★★★
My toddler gets compliments every time she wears it!
Jenna K.
Portland, OR · Sunrise Smiles Onesie
★★★★★
Fast shipping, amazing customer service, and the cutest designs.
Sarah M.
Austin, TX · Best Day Ever Toddler Tee
★★★★★
The perfect birthday shirt! We’ll definitely be ordering again.
Marcus T.
Denver, CO · Adventure Club Youth Tee
★★★★★
Exactly as pictured. Great quality and even cuter in person.
Sarah M.
Austin, TX · Best Day Ever Toddler Tee
★★★★★
The quality exceeded my expectations! The shirt was so soft and absolutely adorable.
Sarah M.
Austin, TX · Best Day Ever Toddler Tee
4.9
Avg. rating
40+
Wash cycles tested
2–3
Day shipping
100%
Printed in-house

Common Questions

Frequently Asked

How long does shipping take? +
Orders are typically made and shipped within 2–5 business days.
Do you accept returns? +
Because each item is made to order, we do not accept returns unless an item arrives damaged or we made an error.
Can I personalize a shirt? +
Yes! Many of our designs can be personalized with names or ages.
What brands do you print on? +
We use premium, boutique-quality blanks selected for comfort and durability.Sample Brands LAT Apparel, Bella Canvas, Rabbit Skins, Gerber Premium, or other like quality premium brands.
How do I know what size to order? +
Shirts are true to size, but if you’re between sizes, we recommend sizing up.
How should I wash my shirt? +
Wash inside out in cold water and tumble dry low for the longest-lasting print.
Printed In-House

Find Their Next Favorite Tee.

Boutique graphics. In-house quality. Shipped straight to your door — usually within the week.
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Little tees, made with big care.