Is mermaid costume for girls profitable to sell on Amazon United States?

The niche generates $201K/yr across 86 tracked products. 7 of 22 products launched in the last 360 days are still selling. 90-day search growth is -17.3%. Flapen's verdict: Skip it (49/100).

How competitive is the mermaid costume for girls niche?

45 brands and 59 sellers compete. The top 5 products take 23% of clicks and top 5 brands hold 50% of demand.

What do buyers complain about in mermaid costume for girls?

Top complaints mined from reviews: Size-Overall, Quality-Overall, Durability. The return rate is 3.8%.

When does demand for mermaid costume for girls peak?

Demand peaks in Sep–Oct; the busiest month runs 8.4× the quietest.

What does it cost to enter the mermaid costume for girls niche?

Listings span $8.04–$53.12; the average listing price is $22.53 (sweet spot $15–$100). The average incumbent carries 2,320 reviews — the moat a new listing must climb.

Mermaid Costume for Girls

Skip it

Weak search conversion (0.8%) — this niche doesn't clear our bar today.

Avg price

Great$22.53

avg 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–$53.12

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Okay2,319.63

avg incumbent reviews — the moat a new listing must climb

Returns

Okay3.8%

return rate — above 5% kills the launch gate

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

Is mermaid costume for girls profitable on Amazon?

According to Flapen's Amazon United States niche tracking, mermaid costume for girls is a $201K/yr Amazon United States market (1.2M searches/yr). The top 5 brands hold 50% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 49/100.

Data updated Jul 10, 2026 · scored weekly · How we score niches

mermaid costume for girls market size & sales

Units sold, revenue, conversion and listing quality across the tracked shelf.

Units sold / yr: 10K–13K; avg 100–250/product
Revenue / yr: $225K–$282K; units × avg price
Conversion rate: 0.8%
Avg BSR: #471
Page quality: 0%
Prime: 97%
Sponsored: 94%
Out of stock: 6.4%
Avg brand age: 40 months
Avg seller age: 173 days

Competition: brands, sellers & click share

Clicks spread well past the top 5 (23% combined) — an open shelf where new products get seen.

Brands

45 flat

Sellers

Top-5 brand share

50%

Top 20: 81%

Top-5 click share

23%

Top 20: 51%

Open market

46%

Disney20%
Fylytota13%
Meland9%
Spooktacular Creations5%
Fun Costumes4%
Danvren4%

mermaid costume for girls 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×

Open Trend

Top mermaid costume for girls search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

little mermaid dress87K/yr +11.9%0.5% conv.
mermaid costume for girls364K/yr -43.3%1.0% conv.
ariel costume for girls216K/yr -44.5%0.6% conv.
ariel costume82K/yr +18.5%0.1% conv.
little mermaid costume133K/yr -35.9%0.4% conv.
mermaid dress up30K/yr +3.3%1.5% conv.
traje de sirena para nia16K/yr +35.0%0.2% conv.
little mermaid dress for girls9K/yr +13.3%0.3% conv.
disfraz de sirena para nia16K/yr +8.2%0.3% conv.
little mermaid costume for girls31K/yr -22.5%1.0% conv.

All search terms

Top mermaid costume for girls products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 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

2mo ago

Disney Little Mermaid Girls Princess Dress Nightgown Fantasy Gown Soft & Cute Pajamas for Kids

Disney$26.5321,893 rev

2mo ago

Disney Princess Ariel Little Mermaid Toddler to Tween Girl Dresses Ruffle Short Sleeve Tutu Sparkle Tulle Skirt Summer Mesh Clothes Birthday Party Gift Casual Outfit Gradient Green 3-4T

Disney$26.64934 rev

7mo ago

Danvren Mermaid Princess Dress for Toddler Girls Sleeveless Ruffle Sleeve Tulle Dresses Casual Summer Outfit for Girl 3-6 Years

Danvren$18.2760 rev

9mo ago

Mskseciy Mermaid Dress Mermaid Tail Costume Girls Princess Dress with Crown for Girl 3-8 Birthday Gifts Xmas Halloween Costumes (Green 5-6 Years)

Mskseciy$17.8248 rev

9mo ago

What reviews say buyers love and hate about mermaid costume for girls

What buyers praise and complain about, mined from review topics.

What buyers love

Size-Overall19%

“The sizing felt accurate”

Quality-Overall15%

“Good quality”

Value For Money10%

“Good value”

Gifting Purpose9%

“Amazing gift”

Advertised Vs Actual Product5%

“As described”

Color5%

“Cute colors”

Fun/Entertainment Experience4%

“also keeps kids entertained”

Material Quality4%

“It was very soft material”

Durability3%

“it still looks brand new”

Brightness/Shine/Glow3%

“has that fun sparkle kids get excited about”

What buyers complain about

Size-Overall37%

“Runs very small”

Quality-Overall16%

“Not well made”

Durability8%

“But Got broken after 1 hour use”

Advertised Vs Actual Product3%

“the dress doesnt look anything like the picture”

Stitch/Finish/Polish3%

“The seams were coming undone”

Assembly/Installation3%

“The crown is impossible to put together”

Allergies2%

“Ruffles on puffed sleeves leaves brush burn rash”

Brightness/Shine/Glow2%

“Doesn't glow well”

Material Quality2%

“Cheaply made”

Thin1%

“very thin”

Top return reasons

Size-Overall62%

Length6%

Material Quality4%

Quality-Overall4%

Chest Fit4%

Advertised Vs Actual Product3%

Waist Fit2%

Value For Money2%

Shoulder Fit1%

Defective Material/Parts1%

Common mermaid costume for girls questions

Is mermaid costume for girls profitable to sell on Amazon United States?: The niche generates $201K/yr across 86 tracked products. 7 of 22 products launched in the last 360 days are still selling. 90-day search growth is -17.3%. Flapen's verdict: Skip it (49/100).
How competitive is the mermaid costume for girls niche?: 45 brands and 59 sellers compete. The top 5 products take 23% of clicks and top 5 brands hold 50% of demand.
What do buyers complain about in mermaid costume for girls?: Top complaints mined from reviews: Size-Overall, Quality-Overall, Durability. The return rate is 3.8%.
When does demand for mermaid costume for girls peak?: Demand peaks in Sep–Oct; the busiest month runs 8.4× the quietest.
What does it cost to enter the mermaid costume for girls niche?: Listings span $8.04–$53.12; the average listing price is $22.53 (sweet spot $15–$100). The average incumbent carries 2,320 reviews — the moat a new listing must climb.