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Adult Starfish Onesie Costume - Sea Creature Halloween One-Piece Cosplay Suit for Women and Men

Free shipping on orders over $29.99

$36.99

$ 17 .99 $17.99

In Stock

1.:Small


2.Color:Starfish


Product details

Fabric type
Polyester
Care instructions
Machine Wash

About this item

  • UNIQUE STARFISH DESIGN – This fun starfish onesie costume features carefully stitched starfish details, soft fabric, and a unique star-shaped design, making you stand out at any event. Perfect for sea creature lovers and Halloween parties
  • COZY & COMFORTABLE – Made from ultra-soft, breathable fleece, this starfish onesie provides warmth and comfort. The detachable gloves keep your hands warm while adding extra fun. Whether you're lounging at home, attending a costume party, or celebrating Halloween, you'll stay cozy all day
  • PRACTICAL & CONVENIENT – This sea creature onesie includes two side pockets for your essentials like phone, keys, or snacks. Designed with a zipper closure for easy on and off, plus a loose fit that allows for free movement. Wear it over your regular clothes for extra warmth and convenience
  • SIZE – Our Adult Starfish Onesie is available in four sizes: Small (4'11"-5'2"), Medium (5'3"-5'6"), Large (5'7"-5'10"), X-Large (5'10"-6'2"), ensuring a fit for different body types and preferences, please check the size chart for detailed sizing
  • PERFECT FOR ANY OCCASION – Ideal for Halloween, costume parties, pajama days, Christmas, cosplay events, and lounging at home. Makes a great gift for birthdays, Christmas, or anyone who loves sea animals



Product Description

1

Make a Splash – Dive Into Fun with the Starfish Onesie!

At AIYOUYIYA, we create imaginative onesie costumes that bring characters to life. This starfish costume merges playful marine design with ultimate comfort.

1

AIYOUYIYA Starfish Onesie Costume Features

  • Starfish-Inspired Shape – Whimsical star outline with outstretched arms to mimic a real sea star.
  • Vibrant Ocean Colors – Eye-catching orange-red hue perfect for parties and festivals.
  • Soft And Comfort – Gentle on skin, warm yet breathable for day-to-night wear.
  • Convenient Pockets – Perfect for storing essentials like keys or phones
  • Zipper Front for Easy Dressing – Quick to slip on and off—great for quick costume changes.
  • Five Sizes to Fit All – From 4'11" to 6'6", we’ve got your cozy covered.

Details

1

Zipper Closure

2

Starfish Gloves

3

Two Side Pockets

3

Elasticized Cuffs

Starfish

Choose Your Size

  • X-Small: Height 4'7" - 4'11" (140cm-150cm)
  • Small: Height 4'11" - 5'2" (150cm-158cm)
  • Medium: Height 5'3" - 5'6" (159cm-168cm)
  • Large: Height 5'7" - 5'10" (168cm-178cm)
  • X-Large: Height 5'10" - 6'2" (178cm-188cm)
  • XX-Large: Height 6'2" - 6'6" (188cm-198cm)

Package Contents

Starfish Onesie Costume × 1


Not Your Mom's Reviews
Reviewed in the United States on May 24, 2025
I got this starfish onesie for my son to wear to his school’s end of the year pajama day. My son absolutely loved this onesie, but he could not actually wear it to school because it was so hot on him. The material is so thick, my son was sweating profusely within minutes of trying it on. We folded up the costume and put it in the back of the closet for him to wear to his school’s Christmas pajama day, when it is much colder outside. All of this to say, the onesie is well made from a very thick material. The colors are super vibrant, and everything is sewn together very well. I usually buy these fun outfits for special days at school expecting them to only last one wear, but I am very confident this onesie will last a very long time. My son will probably outgrow this costume before it falls apart. I am surprised at how nice this starfish costume is, considering the fair price.
Mandy
Reviewed in the United States on May 12, 2025
This is my favorite onesie. It's so cute the fabric is very soft and warm to wear. I'm not sure if it's great for summer but I'm totally going to enjoy it on the cool days. The zipper is durable no issues with it going up and down an feels like a nice quality. The fleece is so warm and soft. It looks great and fits perfectly. Highly recommend this onesie if you like starfish or something comfy to just wear around the house. I'm a huge fan of this brand they are just soft an so cute.