---
title: "Nappies Size 4 — £820K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/baby-products/nappies-size-4"
last_updated: "2026-07-21T11:20:26.384Z"
locale: en
meta:
description: "Niche score 53/100 · £820K/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 53/100 · £820K/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Nappies Size 4 — £820K/yr Amazon UK Niche (2026) - Flapen"
---
# **nappies size 4**
**Worth a look**
Shows low returns (0.1%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Market size 74Growth 24Conversion 88Competition 36Returns 100Price range 75Avg price 86Brand share 0Review moat 25Quality gap 48
**Returns**
**Incredible****0.1%**
return rate — above 6% kills the launch gate
**Conversion**
**Great****10.4%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****£19.45**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£6.10–£41.62**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****£820K**
£820K/yr · 407K searches
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****63%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****4,333**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-1.5%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, nappies size 4 is a £820K/yr Amazon United Kingdom market (407K searches/yr). The top 5 brands hold 100% of demand. Verdict: Worth a look — 53/100.
Data updated Jul 18, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **nappies size 4 market data**
- **Units sold / yr**
- **40K–50K**
- avg 2,000–2,500/product
- **Revenue / yr**
- **£778K–£973K**
- units × avg price
- **Launch success**
- **—**
- 0 of 0 new (360d)
- **Conversion rate**
- **10.4%**
- **Avg BSR**
- **#184**
- **Page quality**
- **0%**
- **Prime**
- **94%**
- **Sponsored**
- **50%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **50 months**
- **Avg seller age**
- **153 days**
## **Competition & brand share**
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**2 **▼falling
**Sellers**
**79**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**63%**
Top 20: 100%
**Open market**
**0%**
- Pampers88% - by Amazon12%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -1.5% search growth over the last 90 days.
10K6KHoliday '24Prime Day '25Spike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/uk/baby-products/nappies-size-4/trend)
## **Top nappies size 4 search terms**
- **pampers size 4**185K/yr+8.8%7.8% conv. - **nappies size 4**64K/yr-12.3%8.7% conv. - **size 4 nappies**47K/yr-15.4%9.6% conv. - **pampers premium protection size 4**13K/yr-10.1%5.8% conv. - **pampers pants size 4**12K/yr+11.4%4.9% conv. - **pampers size 4 pants**10K/yr+35.6%5.9% conv. - **nappy pants size 4**10K/yr-15.3%5.0% conv. - **pampers nappies size 4**9K/yr-1.8%5.2% conv. - **pampers size 4 nappies**8K/yr-12.6%7.5% conv. - **pampers 4**7K/yr+7.8%8.2% conv. [**All search terms **](https://flapen.com/research/uk/baby-products/nappies-size-4/search-terms)
## **Top nappies 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%10%£82K20%£164K30%£246K40%£328K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Pampers Baby-Dry Paw Patrol Edition Size 4 222 Nappies 9kg-14kg Monthly Pack Up to a 100% Leak-Free & Comfortable Night**Pampers**£35.36**4.5★1,762 rev](https://www.amazon.co.uk/dp/B0C74RPMKK) [2**Pampers Premium Protection Size 4 174 Nappies 9kg-14kg Monthly Pack Double protection - Skin comfort - Ultra-soft materials**Pampers**£36.47**4.6★190 rev](https://www.amazon.co.uk/dp/B097JVCVMK) [3**Pampers Premium Protection Nappy Pants Size 4 168 Nappies 9kg-15kg Monthly Pack + Pampers Harmonie Aqua Baby Wipes 1 pack of 10 Wipes**Pampers**£37.49**4.7★3,057 rev](https://www.amazon.co.uk/dp/B097JV1LN9) [4**By Amazon - 84 Ultra Dry Nappies - Size 4 (8-14 kg) (Previously a Mama Bear Brand Same Product)**by Amazon**£10.91**4.1★13,268 rev](https://www.amazon.co.uk/dp/B08XYXCRY8) [5**Pampers Premium Protection S4 x 37**Pampers**£6.10**4.4★11 rev](https://www.amazon.co.uk/dp/B0D1GDHVYM)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Pampers Premium Protection S4 x 37**Pampers**£6.10**11 rev2y ago](https://www.amazon.co.uk/dp/B0D1GDHVYM) [**Pampers Baby-Dry Paw Patrol Edition Size 4 222 Nappies 9kg-14kg Monthly Pack Up to a 100% Leak-Free & Comfortable Night**Pampers**£35.36**1,762 rev3y ago](https://www.amazon.co.uk/dp/B0C74RPMKK) [**PAMPERS Baby-Dry Size 4 Jumbo+ Pack 84 Nappies**Pampers**£14.87**22 rev3y ago](https://www.amazon.co.uk/dp/B0D1GFQ3L4) [**Pampers Baby-Dry Characters Paw Patrol Nappy Pants S4**Pampers**£31.82**2,617 rev3y ago](https://www.amazon.co.uk/dp/B0BLW5QB49) [**Pampers Harmonie Nappies Size 4 174 Nappies 9kg-14kg Monthly Pack Gentle Skin Protection with 100 Percent Pampers Protection**Pampers**£41.62**8,276 rev3y ago](https://www.amazon.co.uk/dp/B0BLW24GPJ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Pampers Premium Protection S4 x 37**Pampers**£6.10**4.4★**▲ 74%**](https://www.amazon.co.uk/dp/B0D1GDHVYM) [**Pampers Baby-Dry Size 4 9-14 kg 25 Count**Pampers**£8.06**4.3★**▲ 71%**](https://www.amazon.co.uk/dp/B00DTR3YQ8) [**Pampers Baby-Dry Nappy Pants Size 4 38 Nappies 9kg-15kg Essential Pack 360 Fit To Help Prevent Gaps And Leaks**Pampers**£6.28**4.6★**▲ 55%**](https://www.amazon.co.uk/dp/B07PHTDJZ1) [**PAMPERS Baby-Dry Size 4 Jumbo+ Pack 84 Nappies**Pampers**£14.87**4.7★**▲ 47%**](https://www.amazon.co.uk/dp/B0D1GFQ3L4) [**by Amazon Disney Nappy Pants Size 4 (9-15 kg) 160 Count (2 Packs of 80) White - Monthly Pack (Previously a Mama Bear brand same product)**by Amazon**£19.25**4.2★**▲ 42%**](https://www.amazon.co.uk/dp/B089T7T8H3)
**~~View all trending →~~**
## **What buyers say about nappies size 4**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**25%
*“Great product”*
**Size-Overall**11%
*“They fit really well”*
**Soft Feel**9%
*“They are gentle and effective”*
**Value For Money**6%
*“Amazing value”*
**Ease Of Use**6%
*“Not very difficult to put on”*
**Leak-Proof**6%
*“Great quality and no leaks”*
**Comfort-Overall**5%
*“comfort”*
**Design-Overall**3%
*“cute design with the cute pictures”*
**Absorbency**2%
*“*they can absorb a fair amount of wee”*
**Thickness**2%
*“They are also nice and thin, and they don't become very bulky”*
### **What buyers complain about **
**Allergies**14%
*“The lack of absorbancy has given our son extremely bad nappy rash to the point he's in severe discomfort”*
**Leak-Proof**13%
*“Theyre constantly leaking when they never used to”*
**Value For Money**10%
*“Very poor value for money”*
**Ease Of Cleaning**9%
*“It just becomes more a mess”*
**Hard Feel**6%
*“Not good nappies are hard”*
**Smell**5%
*“It has an unpleasant urine smell”*
**Moist/Dry**4%
*“also feel quite wet inside”*
**Stale/Rotten/Spoiled**3%
*“Rubbish”*
**Thickness**3%
*“Too thin”*
**Quality-Overall**3%
*“It just doesnt make sense compared to how reliable they used to be”*
### **Top return reasons **
**Size-Overall**100%
## **Common questions**
- **Is nappies size 4 profitable to sell on Amazon United Kingdom?**
- The niche generates £820K/yr across 18 tracked products. 90-day search growth is -1.5%. Flapen's verdict: Worth a look (53/100).
- **How competitive is the nappies size 4 niche?**
- 2 brands and 79 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in nappies size 4?**
- Top complaints mined from reviews: Allergies, Leak-Proof, Value For Money. The return rate is 0.1%.
- **When does demand for nappies size 4 peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the nappies size 4 niche?**
- Listings span £6.10–£41.62; the average listing price is £19.45 (sweet spot $15–$100). The average incumbent carries 4,333 reviews — the moat a new listing must climb.
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