---
title: "overnight diapers size 3 — $11.6M/yr Amazon United States Niche, Score 57/100 - Flapen"
canonical_url: "https://flapen.com/research/us/baby-products/overnight-diapers-size-3"
last_updated: "2026-07-20T20:03:32.719Z"
locale: en
meta:
description: "overnight diapers size 3 shows a $11.6M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "overnight diapers size 3 shows a $11.6M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "overnight diapers size 3 — $11.6M/yr Amazon United States Niche, Score 57/100 - Flapen"
---
# **overnight diapers size 3**
**Worth a look**
Shows a $11.6M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 100Growth 22Conversion 95Competition 19Returns 81Price range 95Avg price 95Brand share 0Review moat 9Quality gap 80
**Market size**
**Incredible****$11.6M**
$11.6M/yr · 2.4M searches
**Conversion**
**Incredible****12.7%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Incredible****$38.77**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$25.78–$64.23**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Great****1.7%**
return rate — above 6% kills the launch gate
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-6.4%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****77%**
top-5 click share — a locked-up shelf
**Review moat**
**Bad****32,612.27**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, overnight diapers size 3 is a $11.6M/yr Amazon United States market (2.4M searches/yr). The top 5 brands hold 100% of demand. Verdict: Worth a look — 57/100.
Data updated Jul 12, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **Market data**
- **Units sold / yr**
- **250K–300K**
- avg 25,000–30,000/product
- **Revenue / yr**
- **$9.7M–$11.6M**
- units × avg price
- **Launch success**
- **—**
- 3 of 3 new (360d)
- **Conversion rate**
- **12.7%**
- **Avg BSR**
- **#11**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **73%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **52 months**
- **Avg seller age**
- **141 days**
## **Competition**
The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **▲rising
**Sellers**
**21**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**77%**
Top 20: 100%
**Open market**
**0%**
- Pampers81% - The Honest Company15% - MooMoo Baby4% - Open — no brand owns it (0%)
## **Demand**
Weekly Amazon search volume, last 44 weeks — -6.4% search growth over the last 90 days.
60K40KSpike '26Sep '25Oct '25Dec '25Feb '26Mar '26May '26
[**Open Trend **](https://flapen.com/research/us/baby-products/overnight-diapers-size-3/trend)
## **Product shelf**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%15%$1.7M30%$3.5M45%$5.2M60%$7.0M1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 11 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Pampers Diapers - Baby Dry - Size 2 112 Count Absorbent Disposable Infant Diaper (Packaging May Vary)**Pampers**$28.76**4.7★97,820 rev](https://www.amazon.com/dp/B00FMWX4JK) [2**Pampers Diapers - Baby Dry - Size 2 234 Count Absorbent Disposable Infant Diaper (Packaging May Vary)**Pampers**$54.07**4.7★97,820 rev](https://www.amazon.com/dp/B07H3815HW) [3**The Honest Company Comfort Dry Disposable Daytime Diapers for Sensitive Skin Hypoallergenic Fragrance-Free Multi-Colored Giraffes + Barnyard Babies Club Box Size 2 (12-18 lbs) 72 Count**The Honest Company**$25.78**4.2★2,613 rev](https://www.amazon.com/dp/B0CKV1JPQZ) [4**Pampers Diapers - Baby Dry - Size 2 186 Count Absorbent Disposable Infant Diaper (Packaging May Vary)**Pampers**$42.94**4.7★97,820 rev](https://www.amazon.com/dp/B07TJH1KV3) [5**The Honest Company Comfort Dry Disposable Daytime Diapers Hypoallergenic Fragrance-Free Sensitive Skin Rose Blossom + Tutu Cute Club Box Size 2 (1218 lbs) 72 Count**The Honest Company**$26.93**4.2★2,613 rev](https://www.amazon.com/dp/B0CKV3GLS2)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Pampers Amore Size 2 (10-22 lbs) 74 Count Our Best Diaper Hypoallergenic & Fragrance Free Up to 100% Leakproof Soft as Cashmere**Pampers**$27.04**450 rev6mo ago](https://www.amazon.com/dp/B0FXYGBMGH) [**Pampers Amore Size 2 (10-22 lbs) 186 Count Our Best Diaper Hypoallergenic & Fragrance Free Up to 100% Leakproof Soft as Cashmere**Pampers**$57.97**450 rev6mo ago](https://www.amazon.com/dp/B0FXYH4SXF) [**Pampers Amore Size 2 (10-22 lbs) 120 Count Our Best Diaper Hypoallergenic & Fragrance Free Up to 100% Leakproof Soft as Cashmere**Pampers**$40.12**450 rev6mo ago](https://www.amazon.com/dp/B0FXYDV5DC) [**The Honest Company Comfort Dry Disposable Daytime Diapers for Sensitive Skin Hypoallergenic Fragrance-Free Multi-Colored Giraffes + Barnyard Babies Club Box Size 2 (12-18 lbs) 72 Count**The Honest Company**$25.78**2,613 rev2y ago](https://www.amazon.com/dp/B0CKV1JPQZ) [**The Honest Company Comfort Dry Disposable Daytime Diapers Hypoallergenic Fragrance-Free Sensitive Skin Rose Blossom + Tutu Cute Club Box Size 2 (1218 lbs) 72 Count**The Honest Company**$26.93**2,613 rev2y ago](https://www.amazon.com/dp/B0CKV3GLS2)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**MooMoo Baby Training Underwear for Boys and Girls Absorbent Toddler Training Pants Cotton Washable and Reusable 2T-7T 8 Packs**MooMoo Baby**$31.28**4.5★**▲ 406%**](https://www.amazon.com/dp/B0B4DHC5V3) [**Pampers Amore Size 2 (10-22 lbs) 120 Count Our Best Diaper Hypoallergenic & Fragrance Free Up to 100% Leakproof Soft as Cashmere**Pampers**$40.12**3.5★**▲ 404%**](https://www.amazon.com/dp/B0FXYDV5DC) [**Pampers Amore Size 2 (10-22 lbs) 186 Count Our Best Diaper Hypoallergenic & Fragrance Free Up to 100% Leakproof Soft as Cashmere**Pampers**$57.97**3.5★**▲ 292%**](https://www.amazon.com/dp/B0FXYH4SXF) [**Pampers Diapers - Baby Dry - Size 2 234 Count Absorbent Disposable Infant Diaper (Packaging May Vary)**Pampers**$54.07**4.7★**▲ 72%**](https://www.amazon.com/dp/B07H3815HW) [**The Honest Company Comfort Dry Disposable Daytime Diapers for Sensitive Skin Hypoallergenic Fragrance-Free Multi-Colored Giraffes + Barnyard Babies Club Box Size 2 (12-18 lbs) 72 Count**The Honest Company**$25.78**4.2★**▲ 46%**](https://www.amazon.com/dp/B0CKV1JPQZ)
**~~View all trending →~~**
## **Reviews**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Soft Feel**18%
*“Soft and absorbent”*
**Absorbency**10%
*“Good absorbency”*
**Leak-Proof**9%
*“No leak at all”*
**Size-Overall**6%
*“The fit is secure yet flexible enough to allow movement and play”*
**Value For Money**6%
*“worth it”*
**Quality-Overall**5%
*“good quality”*
**Durability**3%
*“durable and nice hold for night time use”*
**Comfort-Overall**3%
*“Comfortable Fit”*
**Weight Light**2%
*“suprisingly lightweight to be sucha durable”*
**Allergies**2%
*“dont give my baby any rashes”*
### **What buyers complain about **
**Leak-Proof**17%
*“they leak”*
**Smell**7%
*“Strong smell”*
**Absorbency**6%
*“Bad absorbency”*
**Quality-Overall**5%
*“very bad diapers”*
**Allergies**5%
*“causes diaper rash”*
**Size-Overall**4%
*“it is abit shorter”*
**Value For Money**3%
*“I dont think the price is reasonable”*
**Thickness**3%
*“thickness is below par”*
**Moist/Dry**3%
*“Also, When I change baby, her skin feels wet so I am not sure how these are more absorbent”*
**Adhesion/Stickiness**2%
*“The glue is hard”*
### **Top return reasons **
**Size-Overall**69%
**Leak-Proof**6%
**Age Suitability**5%
**Absorbency**3%
**Advertised Vs Actual Product**3%
**Smell**2%
**Value For Money**2%
**Quality-Overall**2%
**Functionality-Overall**1%
**Thigh Fit**1%
## **Common questions**
- **Is overnight diapers size 3 profitable to sell on Amazon United States?**
- The niche generates $11.6M/yr across 11 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is -6.4%. Flapen's verdict: Worth a look (57/100).
- **How competitive is the overnight diapers size 3 niche?**
- 3 brands and 21 sellers compete. The top 5 products take 77% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in overnight diapers size 3?**
- Top complaints mined from reviews: Leak-Proof, Smell, Absorbency. The return rate is 1.7%.
- **What does it cost to enter the overnight diapers size 3 niche?**
- Listings span $25.78–$64.23; the average listing price is $38.77 (sweet spot $15–$100). The average incumbent carries 32,612 reviews — the moat a new listing must climb.
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