swim diaper size 5
Launch itA $2.4M/yr market growing +187.0% this quarter with returns at 0.5% — clears our launch bar.
Conversion
Incredible23.4%search→purchase rate — share of searches ending in a sale
Returns
Incredible0.5%return rate — above 5% kills the launch gate
Growth
Incredible+187.0%90-day search growth — must beat 0% to launch
Market size
Incredible$2.4M$2.4M/yr · 621K searches
Avg price
Great$16.41avg listing price — sweet spot $15–$100
Price range
Okay$6.42–$20.40cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Okay2,910.08avg incumbent reviews — the moat a new listing must climb
Competition
Bad72%top-5 click share — a locked-up shelf
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Brand share
Bad98%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, swim diaper size 5 is a $2.4M/yr Amazon United States market (621K searches/yr). The top 5 brands hold 98% of demand. Demand peaks in May–Jun–Jul. Verdict: Launch it — 62/100.
Data updated Jul 8, 2026 · scored weekly · How we score niches
swim diaper size 5 market data
- Units sold / yr
- 125K–150K
- avg 6,000–8,000/product
- Revenue / yr
- $2.1M–$2.5M
- units × avg price
- Conversion rate
- 23.4%
- Avg BSR
- #23
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 11.5%
- Avg brand age
- 51 months
- Avg seller age
- 166 days
Competition & brand share
The top 5 products capture 72% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 falling
Sellers
7
Top-5 brand share
98%
Top 20: 100%
Top-5 click share
72%
Top 20: 100%
Open market
0%
- MooMoo Baby45%
- Pampers31%
- Hello Bello15%
- MomEasier5%
- Joyo roy2%
- Nuby2%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +187.0% search growth over the last 90 days.Peak months: May, Jun, Jul · busiest ÷ quietest = 10.5×
Top swim diaper size 5 search terms
- swim diapers size 5236K/yr
- swim diapers size 6139K/yr
- swim diapers size 758K/yr
- size 5 swim diapers31K/yr
- water diapers size 519K/yr
- size 6 swim diapers16K/yr
- swimming diapers size 517K/yr
- little swimmers size 512K/yr
- water diapers size 613K/yr
- swimming diapers size 611K/yr
Top swim diaper size 5 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.
All 13 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
MooMoo Baby Reusable Swim Diapers 3 Pcs Waterproof Swimming Diapers for Baby Swim Lesson
MooMoo Baby$19.044.7★483 rev
MooMoo Baby Reusable Swim Diapers 3 Pcs Waterproof Swimming Diapers for Baby Swim Lesson
MooMoo Baby$19.144.7★483 rev
MooMoo Baby Reusable Swim Diapers 3 Pcs Waterproof Swimming Diapers for Baby Swim Lesson 5T
MooMoo Baby$18.674.7★483 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
Pampers Splashers Swim Diapers Size 6+ 15 Count Disposable Swim Diapers Contains Mess No Swell
Pampers$9.8731,443 rev
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
MooMoo Baby Reusable Swim Diapers 3 Pcs Waterproof Swimming Diapers for Baby Swim Lesson 5T
MooMoo Baby$18.67483 rev
MooMoo Baby Reusable Swim Diapers 3 Pcs Waterproof Swimming Diapers for Baby Swim Lesson 5T
MooMoo Baby$18.48483 rev
Trending
90-day click momentumMomEasier Swim Diapers 3 Pcs Reusable Swimming Diaper for Baby Boys and Girls 2-5T Green
MomEasier$20.404.6★
Pampers Splashers Swim Diapers Size 6+ 15 Count Disposable Swim Diapers Contains Mess No Swell
Pampers$9.874.8★
MooMoo Baby Reusable Swim Diapers 3 Pcs Waterproof Swimming Diapers for Baby Swim Lesson
MooMoo Baby$19.054.7★
MooMoo Baby Reusable Swim Diapers 3 Pcs Waterproof Swimming Diapers for Baby Swim Lesson
MooMoo Baby$19.104.7★
MooMoo Baby Reusable Swim Diapers 3 Pcs Waterproof Swimming Diapers for Baby Swim Lesson
MooMoo Baby$19.044.7★
What buyers say about swim diaper size 5
What buyers praise and complain about, mined from review topics.What buyers love
“fit securely”
“the elastic seems comfortable”
“These are well made”
“secure so that your little one can enjoy play time in the water”
“The designs are pretty cute”
“These are comfortable”
“I find them softer than some of the other competing brands out there”
“these are definitely worth considering”
“Very convenient”
“absorb well without leaking on the way to swim lessons if he happens to wet himself before getting into the pool”
What buyers complain about
“otherwise it would just soak up all the pool water”
“these are not leak proof”
“They might be a little too big still for my baby come summer”
“I do find these a bit expensive as each swim diaper is well over a dollar”
“These do NOT work at all”
“.He has eczema”
“They dont absorb water either”
“The material is thick”
“a bit tight at the seams”
“they are not adjustable”
Top return reasons
Common questions
- Is swim diaper size 5 profitable to sell on Amazon United States?
- The niche generates $2.4M/yr across 13 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +187.0%. Flapen's verdict: Launch it (62/100).
- How competitive is the swim diaper size 5 niche?
- 6 brands and 7 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 98% of demand.
- What do buyers complain about in swim diaper size 5?
- Top complaints mined from reviews: Water Resistance, Leak-Proof, Size-Overall. The return rate is 0.5%.
- When does demand for swim diaper size 5 peak?
- Demand peaks in May–Jun–Jul; the busiest month runs 10.5× the quietest.
- What does it cost to enter the swim diaper size 5 niche?
- Listings span $6.42–$20.40; the average listing price is $16.41 (sweet spot $15–$100). The average incumbent carries 2,910 reviews — the moat a new listing must climb.