mermaid costume for girls
Skip itWeak search conversion (0.8%) — this niche doesn't clear our bar today.
Avg price
Great$22.53avg listing price — sweet spot $15–$100
Competition
Great23%top-5 click share — an open shelf
Brand share
Great50%top-5 brand share — no brand owns this niche
Price range
Great$8.04–$53.12cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Okay3.8%return rate — above 6% kills the launch gate
Review moat
Okay2,319.63avg incumbent reviews — the moat a new listing must climb
Market size
Okay$201K$201K/yr · 1.2M searches
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-17.3%90-day search growth — must beat 0% to launch
Conversion
Bad0.8%search→purchase rate — share of searches ending in a sale
Competition
Clicks spread well past the top 5 (23% combined) — an open shelf where new products get seen.Brands
45 flat
Sellers
59
Top-5 brand share
50%
Open market
46%
- Disney20%
- Fylytota13%
- Meland9%
- Spooktacular Creations5%
- Fun Costumes4%
- Danvren4%
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 86 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Fylytota Girls Mermaid Dress Little Mermaid Costume Princess Sequin Sling Tutu Dress for Toddler Kids Birthday Party Turquoise
Fylytota$25.124.8★39 rev
Meland Mermaid Dress - Little Mermaid Costume with Bag for Girls 3-10 Princess Dress Up Clothes for Birthday Gift Halloween Costume for Toddler Kids 3 4 5 6 7 8 9 10 Years Old
Meland$21.854.3★1,275 rev
Fun Costumes - Disney The Little Mermaid Ariel Costume Princess of the Sea for Fantasy Cosplay Beach Theme Party & Dress Up Small
Fun Costumes$53.124.2★78 rev
Fylytota Girls Mermaid Dress Little Mermaid Costume Princess Sequin Sling Tutu Dress for Toddler Kids Birthday Party Turquoise
Fylytota$24.964.8★39 rev
Meland Mermaid Costume for Girls - Light Up Halloween Costume for Kids Toddler 3-10 Princess Dress Up for Girl Birthday Gift Mermaid Dress for Girls Aged 3-10 Years Old (5-6 Years)
Meland$25.684.5★102 rev
Newest
by launch date
Disney Little Mermaid Girls Princess Dress Nightgown Fantasy Gown Soft & Cute Pajamas for Kids
Disney$25.4821,893 rev
Disney Little Mermaid Girls Princess Dress Nightgown Fantasy Gown Soft & Cute Pajamas for Kids
Disney$26.5321,893 rev
Disney Girls Nightgown Fantasy Gown Comfortable Nightwear Soft & Cute Pajamas for Kids UNDER THE WATER 2 4T
Disney$11.878,990 rev
Disney Girls Nightgown Fantasy Gown Comfortable Nightwear Soft & Cute Pajamas for Kids UNDER THE WATER 2 3T
Disney$13.108,990 rev
G.C Mermaid Costume for Girls Ages 2-7 Light Blue Dress Up Set with Wig Crown Wand Princess Party Halloween Birthday Cosplay Outfit
G.C$27.2332 rev
Trending
90-day click momentumG.C Mermaid Costume for Girls Ages 2-7 Light Blue Dress Up Set with Wig Crown Wand Princess Party Halloween Birthday Cosplay Outfit
G.C$27.234.3★
Disney Little Mermaid Girls Princess Dress Nightgown Fantasy Gown Soft & Cute Pajamas for Kids
Disney$25.484.8★
Mermaid Princess Costume Princess Dress Up Blue Ball Gown with Hairbow for Adult Women (XS)
Saniplaycos$35.153.9★
Disney The Little Mermaid Ariel Baby Girl Dress Blue Under the Sea Sleeveless Casual Summer Sundress Infant Birthday Party Outfits Clothes 6-9 Months
Disney$16.404.8★
Fylytota Girls Mermaid Dress Little Mermaid Costume Princess Sequin Sling Tutu Dress for Toddler Kids Birthday Party Turquoise
Fylytota$25.124.8★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -17.3% search growth over the last 90 days.Peak months: Sep, Oct · busiest ÷ quietest = 8.4×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“The sizing felt accurate”
“Good quality”
“Good value”
“Amazing gift”
“As described”
“Cute colors”
“also keeps kids entertained”
“It was very soft material”
“it still looks brand new”
“has that fun sparkle kids get excited about”
What buyers complain about
“Runs very small”
“Not well made”
“But Got broken after 1 hour use”
“the dress doesnt look anything like the picture”
“The seams were coming undone”
“The crown is impossible to put together”
“Ruffles on puffed sleeves leaves brush burn rash”
“Doesn't glow well”
“Cheaply made”
“very thin”