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Under the Sea First Birthday Onesie – Ocean Theme Cake Smash Outfit

Regular price $ 28.27

Celebrate your little one’s first birthday in style with this adorable Under the Sea birthday onesie! Featuring a charming ocean-inspired design with sea creatures, this baby first birthday outfit is perfect for a beach birthday party, ocean theme celebration, or cake smash photoshoot. Whether you're planning a Little Mermaid, sea animal, or nautical first birthday, this outfit will make your baby the star of the day!

Description

Celebrate your little one’s first birthday in style with this adorable Under the Sea birthday onesie! Featuring a charming ocean-inspired design with sea creatures, this baby first birthday outfit is perfect for a beach birthday party, ocean theme celebration, or cake smash photoshoot. Whether you're planning a Little Mermaid, sea animal, or nautical first birthday, this outfit will make your baby the star of the day!

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.
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