---
title: "Pull Ups Size 4 — $918K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/baby-products/pull-ups-size-4"
last_updated: "2026-08-09T08:53:56.133Z"
locale: en
meta:
description: "Niche score 54/100 · $918K/yr market. Brand-locked demand (top 5 brands take 96% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · $918K/yr market. Brand-locked demand (top 5 brands take 96% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Pull Ups Size 4 — $918K/yr Amazon US Niche (2026) - Flapen"
---
# **pull ups size 4**
**Worth a look**
Shows low returns (0.9%), but brand-locked demand (top 5 brands take 96% of clicks) keeps it on the watch list.
Market size 76Growth 45Conversion 95Competition 18Returns 96Price range 84Avg price 95Brand share 11Review moat 14Quality gap 32
**Returns**
**Incredible****0.9%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****12.3%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Incredible****$33.83**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.02–$51.35**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Great****$918K**
$918K/yr · 221K searches
**Growth**
**Okay****+15.6%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****78%**
top-5 click share — a locked-up shelf
**Review moat**
**Bad****24,786.38**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****96%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, pull ups size 4 is a $918K/yr Amazon United States market (221K searches/yr). The top 5 brands hold 96% of demand. Demand peaks in Jan. Verdict: Worth a look — 54/100.
Data updated Jul 12, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **pull ups size 4 market data**
- **Units sold / yr**
- **20K–25K**
- avg 1,500–2,000/product
- **Revenue / yr**
- **$677K–$846K**
- units × avg price
- **Conversion rate**
- **12.3%**
- **Avg BSR**
- **#17**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **77%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **52 months**
- **Avg seller age**
- **142 days**
## **Competition & brand share**
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▲rising
**Sellers**
**52**
**Top-5 brand share**
**96%**
Top 20: 100%
**Top-5 click share**
**78%**
Top 20: 100%
**Open market**
**2%**
- Pampers79% - Pull-Ups6% - HUGGIES5% - MooMoo Baby3% - Mama Bear3% - JOONYA2% - Open — no brand owns it (1 brand, 2%)
## **Demand & seasonality**
Weekly Amazon search volume, last 101 weeks — +15.6% search growth over the last 90 days.
8K6KPrime Day '24Holiday '24Spike '25Prime Day '25Spike '26 seasonDecMarJunAugNovMarMay
Peak months: Jan · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/baby-products/pull-ups-size-4/trend)
## **Top pull ups size 4 search terms**
- **pampers cruisers size 4**61K/yr+24.7%2.3% conv. - **pampers 360 size 4**26K/yr+11.2%4.2% conv. - **size 4 pull ups**19K/yr+17.7%4.4% conv. - **pull ups size 4**21K/yr+20.6%2.8% conv. - **pull up diapers size 4**16K/yr+10.0%2.3% conv. - **size 4 pull up diapers**8K/yr+13.8%4.6% conv. - **pull on diapers size 4**8K/yr+16.6%1.7% conv. - **pampers pull ups size 4**7K/yr+31.4%4.5% conv. - **360 diapers size 4**7K/yr+19.8%1.7% conv. - **pull up size 4**6K/yr+15.5%1.0% conv. [**All search terms **](https://flapen.com/research/us/baby-products/pull-ups-size-4/search-terms)
## **Top pull ups 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%$92K20%$184K30%$275K40%$367K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Pampers Diapers - Cruisers 360 - Size 4 116 Count Babyproof up to 100% Leakproof Pull-On Diaper**Pampers**$37.93**4.8★27,841 rev](https://www.amazon.com/dp/B08PX1J9SZ) [2**Pampers Diapers - Swaddlers 360 - Size 4 132 Count up to 100% Leakproof Comfy Dry Fit Designed for Easy Changes Pull On Baby Diaper (Packaging May Vary)**Pampers**$46.54**4.5★1,416 rev](https://www.amazon.com/dp/B0CVGXL1S9) [3**Pampers Diapers - Swaddlers 360 - Size 4 19 Count up to 100% Leakproof Comfy Dry Fit Designed for Easy Changes Pull On Baby Diaper**Pampers**$9.28**4.5★1,416 rev](https://www.amazon.com/dp/B0F3ZKP4G7) [4**Huggies Size 4 Diapers Little Movers Baby Diapers Size 4 (22-37 lbs) 150 Count (6 Packs of 25) Packaging May Vary**HUGGIES**$51.35**4.8★46,925 rev](https://www.amazon.com/dp/B0DKYRHL2Y) [5**Pampers Training Pants - Easy Ups Boys & Girls Bluey - Size 2T-3T 140 Count Childrens Potty Underwear (Packaging May Vary)**Pampers**$39.17**4.7★46,269 rev](https://www.amazon.com/dp/B078WB74R9)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Pampers Diapers - Swaddlers 360 - Size 4 19 Count up to 100% Leakproof Comfy Dry Fit Designed for Easy Changes Pull On Baby Diaper**Pampers**$9.28**1,416 rev1y ago](https://www.amazon.com/dp/B0F3ZKP4G7) [**Huggies Size 4 Diapers Little Movers Baby Diapers Size 4 (22-37 lbs) 150 Count (6 Packs of 25) Packaging May Vary**HUGGIES**$51.35**46,925 rev1y ago](https://www.amazon.com/dp/B0DKYRHL2Y) [**HealthyBaby Size 4 Diaper Training Pants (46 Count) Easy Pull-On & Tear-Away Design for Potty Training Leak Protection for Active Toddlers EWG-Verified Safe Plant-Based**Healthybaby**$33.52**355 rev1y ago](https://www.amazon.com/dp/B0DCG8R38P) [**Pampers Diapers - Swaddlers 360 - Size 4 132 Count up to 100% Leakproof Comfy Dry Fit Designed for Easy Changes Pull On Baby Diaper (Packaging May Vary)**Pampers**$46.54**1,416 rev2y ago](https://www.amazon.com/dp/B0CVGXL1S9) [**Joonya Pull-Up Pants Baby Diapers Size 4 L (15-26 lb) - 1 Bag of 25 - Non Toxic Eco-Friendly High Absorbency Overnight Use Ultra Slim & Soft - Made in Denmark**JOONYA**$22.88**195 rev2y ago](https://www.amazon.com/dp/B0CP7549Z4)
**~~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**$31.22**4.5★**▲ 304%**](https://www.amazon.com/dp/B0B4DHCHZF) [**Joonya Pull-Up Pants Baby Diapers Size 4 L (15-26 lb) - 1 Bag of 25 - Non Toxic Eco-Friendly High Absorbency Overnight Use Ultra Slim & Soft - Made in Denmark**JOONYA**$22.88**4.3★**▲ 40%**](https://www.amazon.com/dp/B0CP7549Z4) [**Pampers Diapers - Cruisers 360 - Size 4 116 Count Babyproof up to 100% Leakproof Pull-On Diaper**Pampers**$37.93**4.8★**▲ 12%**](https://www.amazon.com/dp/B08PX1J9SZ) [**Pampers Diapers - Swaddlers 360 - Size 4 19 Count up to 100% Leakproof Comfy Dry Fit Designed for Easy Changes Pull On Baby Diaper**Pampers**$9.28**4.5★**▲ 10%**](https://www.amazon.com/dp/B0F3ZKP4G7) [**Pampers Diapers - Swaddlers 360 - Size 4 132 Count up to 100% Leakproof Comfy Dry Fit Designed for Easy Changes Pull On Baby Diaper (Packaging May Vary)**Pampers**$46.54**4.5★**— 9%**](https://www.amazon.com/dp/B0CVGXL1S9)
**~~View all trending →~~**
## **What buyers say about pull ups size 4**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**12%
*“the quality is always consistent”*
**Absorbency**11%
*“Very Absorbent”*
**Leak-Proof**10%
*“prevent leaks most of the time”*
**Size-Overall**10%
*“They fit well”*
**Soft Feel**8%
*“This is the softest yet most affordable diaper”*
**Value For Money**6%
*“Great price”*
**Ease Of Use**5%
*“theyve been convenient”*
**Comfort-Overall**5%
*“Comfortable”*
**Design-Overall**3%
*“The design is cute”*
**Moist/Dry**2%
*“We love these diapers for our son, they keep him dry all night and dont leak”*
### **What buyers complain about **
**Leak-Proof**15%
*“It leaks”*
**Size-Overall**13%
*“they are huge”*
**Smell**12%
*“These smell awful”*
**Allergies**8%
*“plastic itchy material”*
**Quality-Overall**8%
*“Poor quality”*
**Absorbency**6%
*“Terrible absorbency”*
**Value For Money**3%
*“i see why they are so cheap”*
**Advertised Vs Actual Product**2%
*“False advertising”*
**Storage Capacity**1%
*“Zero Capacity”*
**Thickness**1%
*“They aren't as thick”*
### **Top return reasons **
**Size-Overall**72%
**Advertised Vs Actual Product**5%
**Age Suitability**3%
**Value For Money**3%
**Leak-Proof**3%
**Smell**3%
**Absorbency**2%
**Quality-Overall**1%
**Functionality-Overall**1%
**Material Quality**1%
## **Common questions**
- **Is pull ups size 4 profitable to sell on Amazon United States?**
- The niche generates $918K/yr across 13 tracked products. 90-day search growth is +15.6%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the pull ups size 4 niche?**
- 7 brands and 52 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 96% of demand.
- **What do buyers complain about in pull ups size 4?**
- Top complaints mined from reviews: Leak-Proof, Size-Overall, Smell. The return rate is 0.9%.
- **When does demand for pull ups size 4 peak?**
- Demand peaks in Jan; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the pull ups size 4 niche?**
- Listings span $9.02–$51.35; the average listing price is $33.83 (sweet spot $15–$100). The average incumbent carries 24,786 reviews — the moat a new listing must climb.
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