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Under the Sea Lingerie Costume

Under the Sea Lingerie Costume

Regular price $31.99 USD
Regular price Sale price $31.99 USD
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Product Description and Sizing

Sexy Blue and White Mermaid Lingerie Costume for Fantasy and Cosplay Nights

Dive into your fantasy with the Under the Sea Lingerie Costume — a stunning, seductive blue and white mermaid-inspired lingerie costume that brings the magic of the ocean to life with a bold, daring twist. Crafted from soft polyester fiber with a generous stretch range, this costume flatters a wide range of body types and delivers a whimsical, feminine silhouette that's as beautiful as it is provocative.

Whether you're wearing it for a cosplay event, a Disney-themed night, a Halloween party, or a boudoir shoot, the Under the Sea Lingerie Costume is the piece that transforms any night into an unforgettable underwater fantasy. One size fits most.

Features:

  • Sexy Mermaid Design – Whimsical, ocean-inspired silhouette with a bold, lingerie-forward twist
  • Blue and White Colorway – Dreamy ocean-inspired color combination that's instantly recognizable and endlessly beautiful
  • Polyester Fiber Fabric – Soft, stretchy material (90–95% polyester) with a wide fit range for inclusive sizing
  • One Size Fits Most – Generous stretch range accommodating bust 26–40 inches and hips 33–35 inches
  • Cute and Sexy Mermaid Style – Playful yet provocative design that works beautifully for cosplay, costume, and fantasy events

Details:

  • Material: Polyester fiber (90–95% polyester)
  • Color: Blue and white
  • Style: Sexy mermaid lingerie costume
  • Theme: Mermaid / under the sea / Disney-inspired / cosplay
  • For: Women
  • Size: One size fits most

Size Information (in Inches):

Size Bust Hips
One Size 26-40 33-35

Perfect For:

  • Mermaid cosplay and Disney-themed events
  • Halloween and costume themed nights
  • Boudoir photography and fantasy editorial shoots
  • Under the sea and ocean-themed occasions
  • Anyone who loves whimsical, sexy mermaid costumes

Why You'll Love It:

The Under the Sea Lingerie Costume is the piece that makes every fantasy feel real. The blue and white colorway creates a dreamy, ocean-inspired aesthetic that's instantly recognizable and endlessly beautiful, while the sexy mermaid silhouette delivers a bold, provocative twist on the classic fairytale look that's made to be seen and remembered. The generous stretch range means this costume fits and flatters a wide range of body types, and the soft polyester construction keeps you comfortable through every event, every shoot, and every magical moment. Whether you're going full cosplay or keeping it intimate, this is the costume that brings your underwater fantasy to life.

Note: Sizes may vary. Please allow 2-3cm/0.8-1.2 inches difference due to manual measurement. Colors may appear slightly different on different screens due to monitor settings and lighting conditions.

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Size Guide

For the most accurate measurements, use a soft measuring tape and wear minimal clothing. Stand naturally and breathe normally.

  • Bust: Measure around the fullest part of your bust, keeping the tape parallel to the floor. The tape should be snug but not tight.
  • Waist: Measure around the narrowest part of your natural waistline, typically just above your belly button.
  • Hips: Measure around the fullest part of your hips and buttocks, keeping the tape parallel to the floor.

If you're between sizes, we recommend sizing up for comfort.

Size Bust Waist Hips
XS 30-32" (76-81cm) 23-25" (58-64cm) 33-35" (84-89cm)
S 32-34" (81-86cm) 25-27" (64-69cm) 35-37" (89-94cm)
M 34-36" (86-91cm) 27-29" (69-74cm) 37-39" (94-99cm)
L 36-38" (91-97cm) 29-31" (74-79cm) 39-41" (99-104cm)
XL 38-40" (97-102cm) 31-33" (79-84cm) 41-43" (104-109cm)
XXL 40-42" (102-107cm) 33-35" (84-89cm) 43-45" (109-114cm)

Some products use different sizing - verify on product pages.

To find your cup size, subtract your band measurement from your bust measurement.

Difference Cup Size
Less than 1" (2.5cm) AA
1" (2.5cm) A
2" (5cm) B
3" (7.5cm) C
4" (10cm) D
5" (12.5cm) DD/E
6" (15cm) DDD/F
7" (17.5cm) G
  • Between sizes? Size up for a more comfortable fit, especially for everyday wear.
  • Bra fit: The band should be snug but comfortable. You should be able to fit two fingers under the band.
  • Cup fit: Your breasts should fill the cups completely without spillage or gaping.
  • Straps: Adjust straps so they provide support without digging into your shoulders.
  • Panty fit: Waistband should sit comfortably without rolling or digging in.
  • Fabric stretch: Most lingerie has some stretch. If you prefer a tighter fit, consider sizing down.
  • Care instructions: Hand wash in cold water to maintain elasticity and extend the life of your lingerie.