Is swim diapers size 7 profitable to sell on Amazon United States?

The niche generates $297K/yr across 10 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +185.7%. Flapen's verdict: Worth a look (55/100).

How competitive is the swim diapers size 7 niche?

7 brands and 10 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 95% of demand.

What do buyers complain about in swim diapers size 7?

Top complaints mined from reviews: Size-Overall, Functionality-Overall, Leak-Proof. The return rate is 0.4%.

When does demand for swim diapers size 7 peak?

Demand peaks in May–Jun–Jul; the busiest month runs 11.6× the quietest.

What does it cost to enter the swim diapers size 7 niche?

Listings span $6.42–$28.22; the average listing price is $16.59 (sweet spot $15–$100). The average incumbent carries 3,575 reviews — the moat a new listing must climb.

swim diapers size 7

Worth a look

Shows low returns (0.4%), but a concentrated shelf (top 5 take 86% of clicks) keeps it on the watch list.

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Growth

Incredible+185.7%

90-day search growth — must beat 0% to launch

Conversion

Incredible14.4%

search→purchase rate — share of searches ending in a sale

Avg price

Great$16.59

avg listing price — sweet spot $15–$100

Price range

Good$6.42–$28.22

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

Market size

Good$297K

$297K/yr · 124K searches

Review moat

Okay3,575.2

avg incumbent reviews — the moat a new listing must climb

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Brand share

Bad95%

top-5 brand share — brand-locked demand

Competition

Bad86%

top-5 click share — a locked-up shelf

Signals Trending

According to Flapen's Amazon United States niche tracking, swim diapers size 7 is a $297K/yr Amazon United States market (124K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 55/100.

Data updated Jul 12, 2026 · scored weekly · How we score niches

swim diapers size 7 market data

Units sold / yr: 15K–20K; avg 1,000–1,250/product
Revenue / yr: $249K–$332K; units × avg price
Conversion rate: 14.4%
Avg BSR: #51
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 8.7%
Avg brand age: 60 months
Avg seller age: 159 days

Competition & brand share

The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 falling

Sellers

Top-5 brand share

95%

Top 20: 100%

Top-5 click share

86%

Top 20: 100%

Open market

Pampers47%
Hello Bello24%
MooMoo Baby13%
MomEasier7%
alpree3%
Nuby3%
Open — no brand owns it (1 brand, 3%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +185.7% search growth over the last 90 days.

Peak months: May, Jun, Jul · busiest ÷ quietest = 11.6×

Open Trend

Top swim diapers size 7 search terms

swim diapers size 758K/yr +197.6%11.1% conv.
size 7 swim diapers9K/yr +183.8%11.3% conv.
water diapers size 79K/yr +261.2%7.3% conv.
swimming diapers size 710K/yr +194.5%7.1% conv.
swim pull ups8K/yr +116.3%2.4% conv.
pampers swim diapers size 57K/yr +330.0%0.1% conv.
xl swim diapers5K/yr +195.4%4.0% conv.
large swim diapers4K/yr +145.3%5.0% conv.
swim diaper size 74K/yr +118.1%11.2% conv.
swim diapers xl4K/yr +114.4%4.1% conv.

All search terms

Top swim diapers size 7 products on Amazon

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 10 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Pampers Splashers Swim Diapers Size 6+ 15 Count Disposable Swim Diapers Contains Mess No Swell

Pampers$9.874.8★31,443 rev

Hello Bello Premium Swim Diapers - Size L (32-40 lbs) Cute Extra-Bright Lobster Designs 17 Count Jumbo Pack

Hello Bello$13.414.6★1,260 rev

MooMoo Baby Reusable Swim Diapers 3 Pcs Waterproof Swimming Diapers for Baby Swim Lesson

MooMoo Baby$19.044.7★483 rev

MomEasier Swim Diapers 3 Pcs Reusable Swimming Diaper for Baby Boys and Girls 2-5T Green

MomEasier$20.404.6★26 rev

Hello Bello Premium Swim Diapers I Affordable and Eco-Friendly Disposable Swim Dipes for Babies and Kids I Size Medium

Hello Bello$13.414.6★1,260 rev

Newest

by launch date

MomEasier Swim Diapers 3 Pcs Reusable Swimming Diaper for Baby Boys and Girls 2-5T Green

MomEasier$20.4026 rev

2mo ago

Pampers Splashers Swim Diapers Size 6+ 15 Count Disposable Swim Diapers Contains Mess No Swell

Pampers$9.8731,443 rev

3mo ago

Nuby Swim Pants for Toddlers - 5 Pack - Toddler Swim Diapers with Stretchy Waistline Tear-Away Sides Water-Resistant Outer Layer & Leak-Preventing Cuffs - Size Large (26-37 lbs)

Nuby$6.4246 rev

5mo ago

Cutecrop 4 Pcs Reusable Adult Swim Diapers Washable Cloth Diapers Leakproof Special Needs Swimwear for Incontinence Swimmers(Dark Color Large)

Cutecrop$28.22107 rev

1y ago

MooMoo Baby Reusable Swim Diapers 3 Pcs Waterproof Swimming Diapers for Baby Swim Lesson

MooMoo Baby$19.04483 rev

2y ago

What buyers say about swim diapers size 7

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

What buyers love

Size-Overall21%

“Fit well”

Comfort-Overall10%

“These are comfortable”

Quality-Overall8%

“very well constructed”

Design-Overall8%

“The designs are pretty cute”

Value For Money6%

“the price for this quantity is super fair”

Water Resistance6%

“secure so that your little one can enjoy play time in the water”

Soft Feel6%

“I find them softer than some of the other competing brands out there”

Stretchability/Expandability/Elasticity6%

“the elastic seems comfortable”

Ease Of Use4%

“Very convenient”

Advertised Vs Actual Product3%

“Better than expected”

What buyers complain about

Size-Overall16%

“Was too small reordered larger size”

Functionality-Overall12%

“Didnt work for me”

Leak-Proof9%

“these are not leak proof”

Absorbency4%

“although its not the best trade out since swim diapers are non absorbing”

Value For Money4%

“I do find these a bit expensive as each swim diaper is well over a dollar”

Moist/Dry1%

“long enough to become damp dry”

Advertised Vs Actual Product1%

“This is false advertising”

Quality-Overall1%

“Honestly, this is unacceptable and unsanitary”

Thickness1%

“The material is thinner than a regular diaper”

Water Resistance1%

“it was still a little gross how much liquid came through once wet”

Top return reasons

Size-Overall70%

Advertised Vs Actual Product6%

Quality-Overall3%

Hip Fit3%

Waist Fit3%

Functionality-Overall3%

Thigh Fit2%

Absorbency2%

Leak-Proof1%

Material Quality1%

Common questions

Is swim diapers size 7 profitable to sell on Amazon United States?: The niche generates $297K/yr across 10 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +185.7%. Flapen's verdict: Worth a look (55/100).
How competitive is the swim diapers size 7 niche?: 7 brands and 10 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 95% of demand.
What do buyers complain about in swim diapers size 7?: Top complaints mined from reviews: Size-Overall, Functionality-Overall, Leak-Proof. The return rate is 0.4%.
When does demand for swim diapers size 7 peak?: Demand peaks in May–Jun–Jul; the busiest month runs 11.6× the quietest.
What does it cost to enter the swim diapers size 7 niche?: Listings span $6.42–$28.22; the average listing price is $16.59 (sweet spot $15–$100). The average incumbent carries 3,575 reviews — the moat a new listing must climb.