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Mermaid Costume Kids

Fail

Demand is soft, at -27.0% this quarter, so Mermaid Costume Kids is a Fail.

Flapen Score
45
45 / 100
Ranks 1,513 of 2,461 Fashion niches · −3 vs the category median of 48
Market size
£64K/yr311K searches / yr
90-day growth
-27.0%search demand this quarter
Competition
45%top-5 click share · 22 brands · 28 sellers

Flapen Score

Mermaid Costume Kids against its category

The dotted line is the Fashion average. Past it, Mermaid Costume Kids is stronger. Inside it, weaker.

45Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Mermaid Costume Kids market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Mermaid Costume Kids 311K times last year and spent an estimated £64K. The top 5 brands take 65% of clicks. Demand peaks in Mar–Oct. Flapen scores it 45 out of 100, a Fail.

01 · Demand

An estimated 1.7% of those searches ended in a purchase.

Shoppers searched for this 311K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 1.7% of those searches ended in a purchase. Searches in the last 90 days moved -27.0% against the 90 days before. Searches, conversion and average price together put the market at an estimated £64K a year.

Searches, last 12 months
311K
Growth, 90 days vs prior 90
-27.0%
Conversion, latest week
1.7%
Market size, estimated
£64Ka year
Peak month
March3.3× the quietest month
Top search term
mermaid costume kids127K searches a year

02 · Price

A sale here is worth £11.88.

Listings sell for £11.88 on average, from £7.13 to £29.58. Amazon reports units sold in ranges. This niche sold 4K to 5K a year. The average listing sells 100 to 250 of them. At £11.88 that is £1K to £3K a year per listing.

Average price
£11.88under the $15 to $100 sweet spot
Price range
£7.13–£29.58
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
4K–5K
Units per listing a year
100–250
Revenue per listing a year
£1K–£3K
Returns
3.0%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is ads.

90% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 10.1% of listings are out of stock. The average listing ranks #429 within Girls. It carries 306 reviews at 4.33 stars, so a new listing needs social proof before a better product.

Sponsored listings
90%
Prime listings
100%
Out of stock, average day
10.1%
Average rank
#429in Girls
Average rating
4.33 starsAmazon United Kingdom average 4.36 stars
Average reviews
306per listing
Listings tracked
42

04 · Newcomers

0 of last year's 9 launches cleared the first-year sales bar.

9 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 33 months on average, so a newcomer is not facing entrenched names.

Launched, last 12 months
9
Successful launches
0Amazon's first-year sales bar
Average brand age
33 months

Products

Top Mermaid Costume Kids products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 23, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 45% of clicks. Leaders hold, but buyers still shop past them.

£0£3K£5K£8K£10K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

22 rising

Sellers

28

Est. top-5 brand share

65%

Top 20: 98%

Est. top-5 click share

45%

Top 20: 78%

Open market

28%

  • AOOWU16%
  • KumSoomliy16%
  • MELAND15%
  • BSBUY10%
  • Kids4ever8%
  • AYBUY6%

Demand

Mermaid Costume Kids search demand

Weekly searches over the year, seasonality beneath. Pick a range.

23K18KSpike '24Spike '25Prime Day '25Spike '26Prime Day '26SepDecMarJunAugNovMarMay

Peak months: Mar, Oct · busiest ÷ quietest = 3.3×

Search terms

Top Mermaid Costume Kids search terms shoppers use

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

  • mermaid costume kids127K/yr
  • mermaid costume31K/yr
  • mermaid dress20K/yr
  • mermaid dress for girls9K/yr
  • little mermaid costume kids23K/yr
  • ariel costume kids22K/yr
  • kids mermaid costume10K/yr
  • mermaid outfit7K/yr
  • mermaid costumes6K/yr
  • ariel costume11K/yr

Reviews and returns

What reviews say buyers love and hate about Mermaid Costume Kids

We read the reviews and the return reasons for every product selling here.

20%of positive reviews mention “Size-Overall”
52%of negative reviews mention “Quality-Overall”
3.0%of orders come back
“Awful quality”
A buyer, on “Quality-Overall”52% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

18 topics

NegativePositive

FAQ

Common Mermaid Costume Kids questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data