---
title: "Coterie Diapers Size 4 — $1.2M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/baby-products/coterie-diapers-size-4"
last_updated: "2026-08-09T11:14:37.849Z"
locale: en
meta:
description: "Niche score 59/100 · $1.2M/yr market · 158K searches/yr · $53.22 avg price. Clears our launch bar. Data updated Jul 2026."
"og:description": "Niche score 59/100 · $1.2M/yr market · 158K searches/yr · $53.22 avg price. Clears our launch bar. Data updated Jul 2026."
"og:title": "Coterie Diapers Size 4 — $1.2M/yr Amazon US Niche (2026) - Flapen"
---
# **coterie diapers size 4**
**Launch it**
A $1.2M/yr market growing +7.5% this quarter with returns at 0.5% — clears our launch bar.
Market size 82Growth 34Conversion 97Competition 0Returns 98Price range 80Avg price 92Brand share 0Review moat 72Quality gap 96
**Returns**
**Incredible****0.5%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****14.7%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Incredible****3.9★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Great****$53.22**
avg listing price — sweet spot $15–$100
**Market size**
**Great****$1.2M**
$1.2M/yr · 158K searches
**Price range**
**Great****$20.06–$118.81**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****620**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Okay****+7.5%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****100%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** Quality Gap**](https://flapen.com/research/niches?market=us&signal=quality_gap "Avg rating < 4.0") [** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, coterie diapers size 4 is a $1.2M/yr Amazon United States market (158K searches/yr). The top 5 brands hold 100% of demand. Verdict: Launch it — 59/100.
Data updated Jul 12, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **coterie diapers size 4 market data**
- **Units sold / yr**
- **30K–40K**
- avg 6,000–8,000/product
- **Revenue / yr**
- **$1.6M–$2.1M**
- units × avg price
- **Conversion rate**
- **14.7%**
- **Avg BSR**
- **#110**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **75%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **58 months**
- **Avg seller age**
- **146 days**
## **Competition & brand share**
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **▼falling
**Sellers**
**535**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**100%**
Top 20: 100%
**Open market**
**0%**
- Coterie92% - The Honest Company4% - Pampers4%
## **Demand & seasonality**
Weekly Amazon search volume, last 101 weeks — +7.5% search growth over the last 90 days.
5K4KSpike '24Spike '25Prime Day '25Spike '26 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/baby-products/coterie-diapers-size-4/trend)
## **Top coterie diapers size 4 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%20%$246K40%$492K60%$738K80%$984K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 4 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Coterie The Pant Size 4 Refastenable Training Pants for Sensitive Skin Hypoallergenic Super Absorbent Overnight Leak Protection 2T/3T (20-32 lbs) 136 Count**Coterie**$118.81**3.6★95 rev](https://www.amazon.com/dp/B0F7C14X9C) [2**Coterie Diaper Size 5 22 Count**Coterie**$20.06**4.6★173 rev](https://www.amazon.com/dp/B09MXN14BG) [3**The Honest Company Comfort Dry Disposable Daytime Diapers for Sensitive Skin Hypoallergenic Wild Thang + All The Alpacas Super Club Box Size 4 (2237 lbs) 104 Count**The Honest Company**$47.56**4.0★1,762 rev](https://www.amazon.com/dp/B0CKV1Q24F) [4**Pampers Amore Size 4 (15-34 lbs) 58 Count Our Best Diaper Hypoallergenic & Fragrance Free Up to 100% Leakproof Soft as Cashmere**Pampers**$26.46**3.5★450 rev](https://www.amazon.com/dp/B0FXYGH1Q1)
### **Newest**
by launch date
[**Pampers Amore Size 4 (15-34 lbs) 58 Count Our Best Diaper Hypoallergenic & Fragrance Free Up to 100% Leakproof Soft as Cashmere**Pampers**$26.46**450 rev6mo ago](https://www.amazon.com/dp/B0FXYGH1Q1) [**Coterie The Pant Size 4 Refastenable Training Pants for Sensitive Skin Hypoallergenic Super Absorbent Overnight Leak Protection 2T/3T (20-32 lbs) 136 Count**Coterie**$118.81**95 rev1y ago](https://www.amazon.com/dp/B0F7C14X9C) [**The Honest Company Comfort Dry Disposable Daytime Diapers for Sensitive Skin Hypoallergenic Wild Thang + All The Alpacas Super Club Box Size 4 (2237 lbs) 104 Count**The Honest Company**$47.56**1,762 rev2y ago](https://www.amazon.com/dp/B0CKV1Q24F) [**Coterie Diaper Size 5 22 Count**Coterie**$20.06**173 rev4y ago](https://www.amazon.com/dp/B09MXN14BG)
### **Trending**
90-day click momentum
[**Pampers Amore Size 4 (15-34 lbs) 58 Count Our Best Diaper Hypoallergenic & Fragrance Free Up to 100% Leakproof Soft as Cashmere**Pampers**$26.46**3.5★**▲ 70%**](https://www.amazon.com/dp/B0FXYGH1Q1) [**Coterie The Pant Size 4 Refastenable Training Pants for Sensitive Skin Hypoallergenic Super Absorbent Overnight Leak Protection 2T/3T (20-32 lbs) 136 Count**Coterie**$118.81**3.6★**— 7%**](https://www.amazon.com/dp/B0F7C14X9C) [**The Honest Company Comfort Dry Disposable Daytime Diapers for Sensitive Skin Hypoallergenic Wild Thang + All The Alpacas Super Club Box Size 4 (2237 lbs) 104 Count**The Honest Company**$47.56**4.0★**— 6%**](https://www.amazon.com/dp/B0CKV1Q24F) [**Coterie Diaper Size 5 22 Count**Coterie**$20.06**4.6★**▼ 30%**](https://www.amazon.com/dp/B09MXN14BG)
## **What buyers say about coterie diapers size 4**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Soft Feel**19%
*“The material feels very soft”*
**Size-Overall**14%
*“the fit is true to size”*
**Leak-Proof**12%
*“preventing any leaks”*
**Design-Overall**4%
*“cute design”*
**Absorbency**3%
*“the absorbency is great”*
**Stretchability/Expandability/Elasticity**3%
*“They are buttery soft, very stretchy and absorbent”*
**Quality-Overall**3%
*“Definitely good diapers”*
**Moist/Dry**3%
*“Weve had dry mornings consistently”*
**Allergies**3%
*“Great for my 18 month old - it improved diaper rash”*
**Comfort-Overall**3%
*“comfy & supportive”*
### **What buyers complain about **
**Allergies**12%
*“irritated their skin”*
**Leak-Proof**11%
*“The Gel Leaks”*
**Value For Money**11%
*“Just expensive”*
**Size-Overall**5%
*“Runs Small — Size Up”*
**Quality-Overall**5%
*“One of the worst quality diaper”*
**Moist/Dry**4%
*“The Pure diapers felt dry even overnight”*
**Thickness**3%
*“the only difference i see is maybe these omes are a little thicker”*
**Durability**3%
*“Had these on for less than 2 hours and the diaper some how broke”*
**Smell**2%
*“Smell bad”*
**Sleep Quality**2%
*“and worse, my son developed some sort of irritation, evident from the blood that was on the front of the diaper after a two-hour nap”*
### **Top return reasons **
**Size-Overall**64%
**Leak-Proof**7%
**Age Suitability**6%
**Advertised Vs Actual Product**5%
**Adhesion/Stickiness**2%
**Functionality-Overall**2%
**Value For Money**2%
**Absorbency**2%
**Quality-Overall**1%
**Smell**1%
## **Common questions**
- **Is coterie diapers size 4 profitable to sell on Amazon United States?**
- The niche generates $1.2M/yr across 4 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +7.5%. Flapen's verdict: Launch it (59/100).
- **How competitive is the coterie diapers size 4 niche?**
- 3 brands and 535 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in coterie diapers size 4?**
- Top complaints mined from reviews: Allergies, Leak-Proof, Value For Money. The return rate is 0.5%.
- **When does demand for coterie diapers size 4 peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the coterie diapers size 4 niche?**
- Listings span $20.06–$118.81; the average listing price is $53.22 (sweet spot $15–$100). The average incumbent carries 620 reviews — the moat a new listing must climb.
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