---
title: "Swim Diapers Size 2 — $580K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/swim-diapers-size-2"
last_updated: "2026-08-09T23:30:56.512Z"
locale: en
meta:
description: "Niche score 64/100 · $580K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 64/100 · $580K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Swim Diapers Size 2 — $580K/yr Amazon US Niche (2026) - Flapen"
---
# **swim diapers size 2**
**Worth a look**
Shows demand growing +196.6% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 63Growth 97Conversion 93Competition 55Returns 81Price range 63Avg price 77Brand share 38Review moat 23Quality gap 25
**Growth**
**Incredible****+196.6%**
90-day search growth — must beat 0% to launch
**Conversion**
**Great****11.4%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Great****1.7%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$15.90**
avg listing price — sweet spot $15–$100
**Market size**
**Good****$580K**
$580K/yr · 319K searches
**Price range**
**Good****$9.28–$24.61**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****52%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Okay****82%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****7,648**
avg incumbent reviews — the moat a new listing must climb
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)")
According to Flapen's Amazon United States niche tracking, swim diapers size 2 is a $580K/yr Amazon United States market (319K searches/yr). The top 5 brands hold 82% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 64/100.
Data updated Jul 8, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **swim diapers size 2 market data**
- **Units sold / yr**
- **30K–40K**
- avg 1,500–2,000/product
- **Revenue / yr**
- **$477K–$636K**
- units × avg price
- **Conversion rate**
- **11.4%**
- **Avg BSR**
- **#283**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **95%**
- **Out of stock**
- **5.6%**
- **Avg brand age**
- **47 months**
- **Avg seller age**
- **151 days**
## **Competition & brand share**
The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**10 **▲rising
**Sellers**
**21**
**Top-5 brand share**
**82%**
Top 20: 100%
**Top-5 click share**
**52%**
Top 20: 98%
**Open market**
**10%**
- Esembly34% - babygoal18% - ALVA11% - alpree11% - Hello Bello9% - BISENKID8% - Open — no brand owns it (4 brands, 10%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +196.6% search growth over the last 90 days.
20K15KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul · busiest ÷ quietest = 15.5×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/swim-diapers-size-2/trend)
## **Top swim diapers size 2 search terms**
- **swim diapers size 1**106K/yr+228.0%1.5% conv. - **swim diapers size 2**76K/yr+127.8%0.8% conv. - **size 1 swim diapers**34K/yr+344.9%1.1% conv. - **size 2 swim diapers**17K/yr+180.4%0.7% conv. - **little swimmers size 1**13K/yr+218.6%0.8% conv. - **baby swim diapers size 1**9K/yr+222.6%1.1% conv. - **swim diaper size 1**7K/yr+312.3%1.2% conv. - **little swimmers size 2**8K/yr+129.0%0.4% conv. - **baby swim diapers size 2**6K/yr+166.6%0.9% conv. - **disposable swim diapers size 1**5K/yr+161.4%0.6% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/swim-diapers-size-2/search-terms)
## **Top swim diapers size 2 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.
0%5%$29K10%$58K15%$87K20%$116K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 22 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Esembly Cloth Diaper Cover - Reusable Swim Diaper Waterproof Breathable - Adjustable Outer Layer Over Absorbent Inner for Blowout Protection - Verdant Gingham Size 2 (18-35lbs)**Esembly**$17.13**4.8★619 rev](https://www.amazon.com/dp/B0G49FSQV5) [2**Splashers Swim Diapers Disposable Swim Pants**alpree**$15.93**4.8★161 rev](https://www.amazon.com/dp/B0B7P19Y36) [3**ALVABABY Swim Diapers 2pcs Reusable Baby Boy Swim Diaper 0-8 Months Adjustable Snap Washable Infant Toddler Swimming Diaper for Pool Beach & Swim Lessons Waterproof PUL Leak-Proof UPF 30+ Small Size**ALVA**$9.54**4.6★16,578 rev](https://www.amazon.com/dp/B01JCO56OO) [4**Esembly Cloth Diaper Cover - Reusable Swim Diaper Waterproof Breathable - Adjustable Outer Layer Over Absorbent Inner for Blowout Protection - Penny Dot Size 1 (7-17lbs)**Esembly**$17.52**4.8★619 rev](https://www.amazon.com/dp/B0G49K3KYP) [5**Babygoal Reusable Baby Girl Swim Diapers 3 Pack - Adjustable Washable for 0-8 Months Infants - Ideal for Swimming Lessons - Flower Design**babygoal**$10.32**4.5★10,021 rev](https://www.amazon.com/dp/B07KPVPXBL)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**MomEasier Swim Diapers 3 Pcs Reusable Swimming Diaper for Baby Boys and Girls 2-5T Green**MomEasier**$20.40**26 rev1mo ago](https://www.amazon.com/dp/B0H1MJ53CX) [**Esembly Cloth Diaper Cover - Reusable Swim Diaper Waterproof Breathable - Adjustable Outer Layer Over Absorbent Inner for Blowout Protection - Verdant Gingham Size 2 (18-35lbs)**Esembly**$17.13**619 rev3mo ago](https://www.amazon.com/dp/B0G49FSQV5) [**Esembly Cloth Diaper Cover - Reusable Swim Diaper Waterproof Breathable - Adjustable Outer Layer Over Absorbent Inner for Blowout Protection - Penny Dot Size 1 (7-17lbs)**Esembly**$17.52**619 rev3mo ago](https://www.amazon.com/dp/B0G49K3KYP) [**Esembly Cloth Diaper Cover - Reusable Swim Diaper Waterproof Breathable - Adjustable Outer Layer Over Absorbent Inner for Blowout Protection - Forget-me-not Size 2 (18-35lbs)**Esembly**$18.33**619 rev3mo ago](https://www.amazon.com/dp/B0G49J7SLK) [**Esembly Cloth Diaper Cover - Reusable Swim Diaper Waterproof Breathable - Adjustable Outer Layer Over Absorbent Inner for Blowout Protection - Verdant Gingham Size 1 (7-17lbs)**Esembly**$17.52**619 rev3mo ago](https://www.amazon.com/dp/B0G49BTKWB)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Esembly Cloth Diaper Cover - Reusable Swim Diaper Waterproof Breathable - Adjustable Outer Layer Over Absorbent Inner for Blowout Protection - Verdant Gingham Size 1 (7-17lbs)**Esembly**$17.52**4.8★**▲ 63%**](https://www.amazon.com/dp/B0G49BTKWB) [**MomEasier Swim Diapers 3 Pcs Reusable Swimming Diaper for Baby Boys and Girls 2-5T Green**MomEasier**$20.40**4.6★**▲ 63%**](https://www.amazon.com/dp/B0H1MJ53CX) [**Esembly Cloth Diaper Cover - Reusable Swim Diaper Waterproof Breathable - Adjustable Outer Layer Over Absorbent Inner for Blowout Protection - Penny Dot Size 1 (7-17lbs)**Esembly**$17.52**4.8★**▲ 62%**](https://www.amazon.com/dp/B0G49K3KYP) [**Esembly Cloth Diaper Cover - Reusable Swim Diaper Waterproof Breathable - Adjustable Outer Layer Over Absorbent Inner for Blowout Protection - Verdant Gingham Size 2 (18-35lbs)**Esembly**$17.13**4.8★**▲ 62%**](https://www.amazon.com/dp/B0G49FSQV5) [**Esembly Cloth Diaper Cover - Reusable Swim Diaper Waterproof Breathable - Adjustable Outer Layer Over Absorbent Inner for Blowout Protection - Forget-me-not Size 2 (18-35lbs)**Esembly**$18.33**4.8★**▲ 62%**](https://www.amazon.com/dp/B0G49J7SLK)
**~~View all trending →~~**
## **What buyers say about swim diapers size 2**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**15%
*“The size 1 fit perfectly”*
**Quality-Overall**10%
*“I think they are well made”*
**Absorbency**8%
*“Theyre WAY more absorbent”*
**Adjustability/Rotatability/Reclining**7%
*“theyre adjustable to grow with baby”*
**Water Resistance**5%
*“Perfect for our first swim”*
**Ease Of Use**5%
*“Easy to use”*
**Stretchability/Expandability/Elasticity**4%
*“Secure elastic for reliable leak containment”*
**Value For Money**4%
*“the great price I would definitely buy again the package arrived in good condition”*
**Ease Of Cleaning**4%
*“they were very easy to clean”*
**Soft Feel**3%
*“They are super soft”*
### **What buyers complain about **
**Size-Overall**17%
*“SIZING IS OFF”*
**Smell**13%
*“Smelled like harsh chemicals”*
**Water Resistance**10%
*“was soaked and didnt protect it from water, which completely failed to meet its purpose”*
**Ease Of Use**7%
*“Just a little complex to put on”*
**Functionality-Overall**7%
*“These do NOT work at all”*
**Leak-Proof**6%
*“the diapers leaked right away”*
**Ease Of Cleaning**3%
**Moist/Dry**3%
*“all the clothes got wet”*
**Sensitivity-Overall**2%
*“Only downside is that its not designed for sensitive skin”*
**Value For Money**2%
*“on the more expensive side”*
### **Top return reasons **
**Size-Overall**73%
**Advertised Vs Actual Product**3%
**Value For Money**3%
**Age Suitability**2%
**Material Quality**2%
**Quality-Overall**2%
**Functionality-Overall**2%
**Thin**2%
**Waist Fit**2%
**Hip Fit**1%
## **Common questions**
- **Is swim diapers size 2 profitable to sell on Amazon United States?**
- The niche generates $580K/yr across 22 tracked products. 2 of 9 products launched in the last 360 days are still selling. 90-day search growth is +196.6%. Flapen's verdict: Worth a look (64/100).
- **How competitive is the swim diapers size 2 niche?**
- 10 brands and 21 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 82% of demand.
- **What do buyers complain about in swim diapers size 2?**
- Top complaints mined from reviews: Size-Overall, Smell, Water Resistance. The return rate is 1.7%.
- **When does demand for swim diapers size 2 peak?**
- Demand peaks in May–Jun–Jul; the busiest month runs 15.5× the quietest.
- **What does it cost to enter the swim diapers size 2 niche?**
- Listings span $9.28–$24.61; the average listing price is $15.90 (sweet spot $15–$100). The average incumbent carries 7,648 reviews — the moat a new listing must climb.
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