Toddler 3D Mermaid Dolphin Costume

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Make their mermaid fantasies a reality on Halloween with this playful costume! The sparkly tunic is designed with iridescent star appliqués, and the dolphin is made of soft-to-the-touch materials so your little one stays warm and comfy. Plus, it’s hypoallergenic so it’s safer for kids.


  • The mermaid tail is attached to one side of dolphin. Your child can easily get in and out of costume with large opening at bottom of dolphin.
  • Made of 100% polyester felt, tulle and polyester lycra with soft foam.
  • Our costume is finished in garment-quality stitching and construction so it can be handed down to siblings and worn for years to come.
  • Costume is yarn-dyed – Fibers are treated individually with environmentally safe dyes before weaving to offer vibrant, lasting colors.
  • This one-piece design includes mermaid sitting on 3-D dolphin.
  • Undergarments not included.


  • Pottery Barn Kids exclusive.
  • Sizes 3T and 4-6 years.
  • See size chart.
  • Spot clean.
  • Imported.
Dimensions & Care


Size 3T
  • Neck Opening: 5.5" wide
  • Arm Hole: 5" high
  • Chest Circumference: 11.5"
  • Waist (elastic relaxed): 10"
  • Waist (elastic extended): 13.5"
  • Dolphin: 25" long (excluding tail)
  • Bottom Opening: 9" diameter, 15.5" wide
Size 4–6Y
  • Neck Opening: 6" wide
  • Arm Hole: 5.5" high
  • Chest Circumference: 13"
  • Waist (elastic relaxed): 11"
  • Waist (elastic extended): 14.5"
  • Dolphin: 28" long (excluding tail)
  • Bottom Opening: 10" diameter, 15.5" wide


  • Spot clean with a damp, white cloth.
Shipping & Returns


Standard UPS can deliver most in-stock items within 3-5 business days.


  • Available within the contiguous 48 states
  • An extra charge of $26 per address. 
  • Order by 6pm PT Monday through Friday, you'll receive your order the next business day
  • Orders placed on Friday after 6pm PT through Sunday will arrive on Tuesday.
  • Monogrammed items take additional days for delivery.  A delivery estimate will be quoted on your Payment & Review page.


Select oversized items have an additional delivery and processing surcharge; this charge is listed below the item price.

View our complete Shipping and Delivery.


Eligible items can be returned for a refund of the merchandise value within 30 days of receiving an order or 7 days for Quick Ship upholstery items. An original receipt or gift receipt is required.


  • Stores - You can return most non-furniture items to your local Pottery Barn Kids store for free.
  • By Phone - For non-custom furniture and other oversized items, call Customer Service at 1-800-993-4923
  • By UPS - print a return label from our Returns Policy page and bring to a UPS location.


Delivery fees are non-refundable and prior purchases are not eligible for a price adjustment.

  • Monogrammed/Personalized items
  • Made to Order items, including custom rugs and furniture
  • Mattresses
  • Gift cards
  • Final sale items (with prices ending in $.X7 or $.X9)
  • Items damaged through normal wear and tear


For assistance please contact Customer Service at 1.888.922.4119, 7 days a week, 5:00 am - 9:00 pm (PST). We cannot accept returns on final-sale items ending in .99, monogrammed items or items damaged through normal wear and tear. Made-to-Order furniture or rugs are not eligible for returns. Delivery fees are non-refundable.


View our complete Returns Policy.

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