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Sister of the Birthday Boy turtle under the sea matching sibling shirt
Sister of the Birthday Boy turtle under the sea matching sibling shirt 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.
Sister of the Birthday Boy turtle under the sea matching sibling shirt
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

Oneder the Sea Turtle 1st Birthday Sister Shirt, Under the Sea Party Shirt, Big Sister Birthday Outfit, Ocean Party Family Gift

$ 16.98

Looking for a matching outfit for the birthday boy's sister? This "Sister of the Birthday Boy" shirt features the same "Oneder the Sea" turtle design, perfect for coordinating family photos at an under-the-sea themed 1st birthday party, a sibling matching set, or an ocean party. Pairs perfectly with the birthday boy's own turtle bodysuit for a complete family birthday set.

★★★★★
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: Big Brother & Big Sister, New Arrivals & Siblings, The Birthday Shop | Custom Outfits & Party Tees, Under The Sea Party!
Description

Looking for a matching outfit for the birthday boy's sister? This "Sister of the Birthday Boy" shirt features the same "Oneder the Sea" turtle design, perfect for coordinating family photos at an under-the-sea themed 1st birthday party, a sibling matching set, or an ocean party. Pairs perfectly with the birthday boy's own turtle bodysuit for a complete family birthday set.

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