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May include: A white short-sleeved t-shirt featuring the text This LITTLE Mermaid is 4 in teal and purple script. The design includes small illustrations of a seashell, a starfish, and a mermaid tail. The shirt is paired with a blue tulle skirt.
May include: A white short-sleeved t-shirt featuring the text This LITTLE Mermaid is 4 in teal and purple script. The design includes small illustrations of a seashell, a starfish, and a mermaid tail. The shirt is paired with a blue tulle skirt. a variety of children's clothing options, including short sleeve bodysuits, long sleeve bodysuits, short sleeve t-shirts, long sleeve t-shirts, girls' fitted t-shirts, fringe dresses, and ruffle sleeve bodysuits. a baby wearing a short sleeve and long sleeve onesie. The image is a children's size chart, specifically part 2 of 2, featuring various sizes of children's clothing such as short sleeves, long sleeves, and fringe dresses. The image is a collage of multiple images, and I will describe each one individually. There is no need to describe each image individually, as it would be redundant and vague. Instead, I will describe the image as a whole, focusing on the content and context rather than individual elements. The image is a collage of various images related to the Bella Lexi Boutique, including a social media post, a website, and an email address. The image does not contain any text that can be described in fewer than 500 characters.
May include: A white short-sleeved t-shirt featuring the text This LITTLE Mermaid is 4 in teal and purple script. The design includes small illustrations of a seashell, a starfish, and a mermaid tail. The shirt is paired with a blue tulle skirt.
a variety of children's clothing options, including short sleeve bodysuits, long sleeve bodysuits, short sleeve t-shirts, long sleeve t-shirts, girls' fitted t-shirts, fringe dresses, and ruffle sleeve bodysuits.
a baby wearing a short sleeve and long sleeve onesie.
The image is a children's size chart, specifically part 2 of 2, featuring various sizes of children's clothing such as short sleeves, long sleeves, and fringe dresses.
The image is a collage of multiple images, and I will describe each one individually. There is no need to describe each image individually, as it would be redundant and vague. Instead, I will describe the image as a whole, focusing on the content and context rather than individual elements.
The image is a collage of various images related to the Bella Lexi Boutique, including a social media post, a website, and an email address. The image does not contain any text that can be described in fewer than 500 characters.
On Sale

Mermaid Birthday, Fourth Birthday, This Little Mermaid is 4, 4th Birthday, Mermaid Party, Mermaid Shirt, Mermaid Theme, Under the Sea,

$ 24.98

This is such an adorable custom Birthday Dress or Shirt! It reads "This Little Mermaid is 4" with little mermaid elements added. Perfect for your little girls Fourth Birthday Party! Since this design is printed directly onto the fabric, you don't have to worry about it pealing or warping! Have your little one stand out with this custom design which she'll be able to wear long after her birthday! Also makes a great gift!

★★★★★
Loved by 47,000+ families
Real reviews from real Bella Lexi customers
★★★★★

“So cute! Perfect for my son's birthday. The quality was amazing and it arrived right on time.”

Etsy Customer · Birthday
★★★★★

“Just darling and PERFECT for my boy's first rodeo! Fast shipping!”

Rachel J. · Birthday
★★★★★

“Just as described. Very fast shipping! Cannot wait for the party! The shirt is adorable!”

Etsy Customer · Birthday
See all 47,000+ reviews →
Category: Girl Birthdays, The Birthday Shop | Custom Outfits & Party Tees
Description

This is such an adorable custom Birthday Dress or Shirt! It reads "This Little Mermaid is 4" with little mermaid elements added. Perfect for your little girls Fourth Birthday Party! Since this design is printed directly onto the fabric, you don't have to worry about it pealing or warping! Have your little one stand out with this custom design which she'll be able to wear long after her birthday! Also makes a great gift!

Shipping

Handcrafted & Made to Order
Every Bella Lexi item is custom-made just for you. No shelf stock, no shortcuts — just quality pieces printed on demand so we can offer the level of personalization our customers love.

  • Processing Time: Please allow up to 5 business days for your order to be made before it ships.
  • Custom Requests: Want to change a color, add a name, or tweak a design? Contact us before ordering and we'll make it happen.
  • Need it Fast? Message us before purchasing to discuss rush options. Additional fees may apply.
Sizing / Fit

Finding Your Fit
All measurements vary by garment style. For the best fit, we recommend:

  • View our Size Guide: See measurements for every garment style at bellalexi.com/pages/size-guide
  • Size Up: When in between sizes, always go up — your little one will grow into it!
  • Ask Us First: Not sure? Send us a message before ordering. We're happy to help you find the right size.

Our Garments
We use high-quality brands to create your custom pieces.

  • Onesies® Brand: We use genuine Gerber Onesies® brand bodysuits (Short Sleeve, sizes 0–3M and 3–6M). Onesies® is a registered trademark of Gerber Childrenswear LLC.

All Sales are Final
Every item is custom-made just for you. We cannot accept returns or exchanges due to sizing. Please review the size guide carefully before ordering!

Care / Quality

Professional Quality, Baby Safe
At Bella Lexi Boutique we use direct-to-garment printing technology — no vinyl, no transfers, no cracking or peeling. The design becomes part of the fabric.

Our inks are eco-friendly, non-toxic, and Oeko-Tex Standard 100 certified at Class 1 — the highest safety rating, approved for sensitive newborn skin.

Washing Instructions

  • Turn Inside Out before washing to protect the print.
  • Machine Wash Cold with like colors.
  • No Bleach or harsh detergents.
  • Tumble Dry Low or hang to air dry for best results.
Reviews