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Monofin

Maybe

Search demand grew +170.8% this quarter. But buyers convert on only 1.6% of searches, so Monofin is a Maybe.

Flapen Score
53
53 / 100
Top 28% of 8,101 Sports & Outdoors niches · +6 vs the category median of 47
Market size
$127K/yr150K searches / yr
90-day growth
+170.8%search demand this quarter
Competition
36%top-5 click share · 14 brands · 21 sellers

Flapen Score

Monofin against its category

The dotted line is the Sports & Outdoors average. Past it, Monofin is stronger. Inside it, weaker.

53Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Monofin market on Amazon at a glance

Shoppers on Amazon United States searched for Monofin 150K times last year and spent an estimated $127K. The top 5 brands take 87% of clicks. Demand peaks in Jun–Jul–Aug. Flapen scores it 53 out of 100, a Maybe.

01 · Demand

An estimated 1.6% of those searches ended in a purchase.

Shoppers searched for this 150K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 1.6% of those searches ended in a purchase. Searches in the last 90 days moved +170.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated $127K a year.

Searches, last 12 months
150K
Growth, 90 days vs prior 90
+170.8%
Conversion, latest week
1.6%
Market size, estimated
$127Ka year
Peak month
July6.1× the quietest month
Top search term
monofin50K searches a year

02 · Price

A sale here is worth $54.64.

Listings sell for $54.64 on average, from $5.98 to $228.28. Amazon reports units sold in ranges. This niche sold 2K to 3K a year. The average listing sells 0 to 100 of them. At $54.64 that is $0 to $5K a year per listing.

Average price
$54.64inside the $15 to $100 sweet spot
Price range
$5.98–$228.28
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
2K–3K
Units per listing a year
0–100
Revenue per listing a year
$0–$5K
Returns
4.2%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is low.

78% of listings pay for placement with sponsored ads. 75% ship with Prime. On an average day, 2.5% of listings are out of stock. The average listing ranks #1,556 within Water Sports. It carries 1,181 reviews at 4.47 stars, so a new listing needs social proof before a better product.

Sponsored listings
78%
Prime listings
75%
Out of stock, average day
2.5%
Average rank
#1,556in Water Sports
Average rating
4.47 starsAmazon United States average 4.42 stars
Average reviews
1,181per listing
Listings tracked
51

04 · Newcomers

8 of last year's 10 launches cleared the first-year sales bar.

10 products launched here in the last 12 months. 8 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 49 months on average, so the names here are settling in.

Launched, last 12 months
10
Successful launches
8Amazon's first-year sales bar
Average brand age
49 months

Products

Top Monofin products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Sign in to see the products

The products selling in this niche are for signed-in readers. Every market figure above stays open to everyone.

Competition

Competition: brands, sellers & click share

The top 5 products take only 36% of clicks. An open shelf where new products get seen.

Brands

14 rising

Sellers

21

Top-5 brand share

87%

Top 20: 100%

Top-5 click share

36%

Top 20: 78%

Open market

10%

  • Brand 130%
  • Brand 223%
  • Brand 319%
  • Brand 47%
  • Brand 57%
  • Brand 63%
  • Open — no brand owns it (8 brands, 10%)

Demand

Monofin search demand

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

8K6KHoliday '24Spike '25Prime Day '25Black Friday '25Holiday '25Spike '26Prime Day '26SepDecMarJunAugNovMarMay

Peak months: Jun, Jul, Aug · busiest ÷ quietest = 6.1×

Search terms

Top Monofin search terms shoppers use

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

  • monofin50K/yr
  • monofin adult18K/yr
  • mermaid fin17K/yr
  • mermaid fins for girls11K/yr
  • mono fin6K/yr
  • adult monofin5K/yr
  • monofin for kids6K/yr
  • mermaid monofin6K/yr
  • mermaid fins7K/yr
  • mermaid fin for swimming7K/yr

Reviews and returns

What reviews say buyers love and hate about Monofin

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

18%of positive reviews mention “Size-Overall”
53%of negative reviews mention “Size-Overall”
4.2%of orders come back
“Tight”
A buyer, on “Size-Overall”53% 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 Monofin questions

Answered from the same tracked data.