---
title: "Size 5 Girls Underwear — $103K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/size-5-girls-underwear"
last_updated: "2026-08-10T11:44:09.656Z"
locale: en
meta:
description: "Niche score 55/100 · $103K/yr market · 122K searches/yr · $15.03 avg price. Strong incumbent ratings (4.8★) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 55/100 · $103K/yr market · 122K searches/yr · $15.03 avg price. Strong incumbent ratings (4.8★) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Size 5 Girls Underwear — $103K/yr Amazon US Niche (2026) - Flapen"
---
# **size 5 girls underwear**
**Worth a look**
Shows low returns (1.3%), but strong incumbent ratings (4.8★) keeps it on the watch list.
Market size 25Growth 36Conversion 63Competition 86Returns 89Price range 67Avg price 75Brand share 79Review moat 21Quality gap 16
**Returns**
**Great****1.3%**
return rate — above 5% kills the launch gate
**Competition**
**Great****29%**
top-5 click share — an open shelf
**Brand share**
**Great****56%**
top-5 brand share — no brand owns this niche
**Avg price**
**Great****$15.03**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$9.30–$26.48**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****5.6%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Okay****+8.9%**
90-day search growth — must beat 0% to launch
**Market size**
**Okay****$103K**
$103K/yr · 122K searches
**Review moat**
**Bad****10,461.63**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.8★**
avg incumbent rating — lower means beatable quality
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United States niche tracking, size 5 girls underwear is a $103K/yr Amazon United States market (122K searches/yr). The top 5 brands hold 56% of demand. Demand peaks in Jul–Aug. Verdict: Worth a look — 55/100.
Data updated Jul 11, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **size 5 girls underwear market data**
- **Units sold / yr**
- **6K–8K**
- avg 100–250/product
- **Revenue / yr**
- **$90K–$120K**
- units × avg price
- **Conversion rate**
- **5.6%**
- **Avg BSR**
- **#41**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **88%**
- **Out of stock**
- **0.2%**
- **Avg brand age**
- **44 months**
- **Avg seller age**
- **143 days**
## **Competition & brand share**
Clicks spread well past the top 5 (29% combined) — an open shelf where new products get seen.
**Brands**
**25 **▲rising
**Sellers**
**34**
**Top-5 brand share**
**56%**
Top 20: 98%
**Top-5 click share**
**29%**
Top 20: 68%
**Open market**
**38%**
- Fruit of the Loom17% - Winging Day12% - Hanes12% - Sladatona8% - Boboking7% - Family Feeling5%
## **Demand & seasonality**
Weekly Amazon search volume, last 97 weeks — +8.9% search growth over the last 90 days.
7K5KHoliday '24Spike '25Prime Day '25Black Friday '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jul, Aug · busiest ÷ quietest = 2.5×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/size-5-girls-underwear/trend)
## **Top size 5 girls underwear search terms**
- **size 5 girls underwear**20K/yr+6.9%5.0% conv. - **girls size 5 underwear**13K/yr+20.0%4.2% conv. - **girls panties size 5**14K/yr+25.1%4.3% conv. - **size 5 underwear girls**11K/yr-10.7%4.5% conv. - **girl underwear size 5**5K/yr+25.5%5.5% conv. - **5t cotton underwear girls**5K/yr+16.2%3.9% conv. - **4t 5t girls underwear**6K/yr+28.4%7.7% conv. - **little girls underwear size 5**7K/yr-6.0%4.3% conv. - **4t/5t girls underwear**5K/yr+36.2%7.5% conv. - **4t girls panties**5K/yr+1.9%5.7% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/size-5-girls-underwear/search-terms)
## **Top size 5 girls underwear 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%2%$2K4%$4K6%$6K8%$8K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Hanes Girls and Toddler Underwear Cotton Knit Tagless Brief Hipster and Bikini Panties Multipack (Colors May Vary)**Hanes**$10.10**4.6★17,270 rev](https://www.amazon.com/dp/B07YNXM2R7) [2**Winging Day Little Girls Assorted Prints Cotton Panties Size 5 (6-Pack)**Winging Day**$14.89**4.7★6,088 rev](https://www.amazon.com/dp/B0CSXTWCLC) [3**Sladatona Girls Soft Kids Starfish Briefs Comfortable Panites Toddler Undies 5T**Sladatona**$20.50**4.8★884 rev](https://www.amazon.com/dp/B0DJKM3FHF) [4**Boboking Little Girls Undies Kids Soft 100% Cotton Panties Underwear (Pack of 6) 5-6yrs Pink**Boboking**$14.10**4.8★13,600 rev](https://www.amazon.com/dp/B07PZC9CB5) [5**Fruit of the Loom Toddler Girls Toddler Girls Tag-Free Cotton Underwear Briefs**Fruit of the Loom**$13.47**4.7★24,500 rev](https://www.amazon.com/dp/B01M21DFJD)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Yoofoss Girls Underwear 100% Organic Cotton Soft Toddler Kids Underwear Tag-free Comfort Girls Panties 6-Pack - Purple Unicorn 5T**Yoofoss**$10.06**187 rev3mo ago](https://www.amazon.com/dp/B0GFSSQ7L8) [**BliBliTaTa Girls Underwear Soft Cotton Tagless Panties for Toddlers & Little Kids Comfort Breathable Briefs in Sizes 18-24 Months 2T 3T 4T 5T 6T 7 8 10 12 Years Old 8-Pack Colorful-Flowers-5**BliBliTaTa**$14.77**959 rev10mo ago](https://www.amazon.com/dp/B0FNCPW8ZP) [**Yzjcafriz Girls Underwear 12 Pack Soft Kids Briefs Cotton Comfortable Panites (US Age 5 Pink)**Yzjcafriz**$13.70**328 rev1y ago](https://www.amazon.com/dp/B0FG331DG5) [**JAHSIYI Girls Underwear Toddler Unicorn Panties Little Kids Undies Children Horse Soft 100% Cotton Underpants Size 4T 5T Briefs Age 4 5 Years Old Tagless Clothes Panty**JAHSIYI**$9.54**619 rev1y ago](https://www.amazon.com/dp/B0FBW6KJC7) [**BliBliTaTa Girls Underwear Soft Cotton Tagless Panties for Toddlers & Little Kids Comfort Breathable Briefs in Sizes 18-24 Months 2T 3T 4T 5T 6T 7 8 10 12 Years Old 8-Pack Pink-6**BliBliTaTa**$14.94**959 rev1y ago](https://www.amazon.com/dp/B0DW9C3F4L)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Yoofoss Girls Underwear 100% Organic Cotton Soft Toddler Kids Underwear Tag-free Comfort Girls Panties 6-Pack - Purple Unicorn 5T**Yoofoss**$10.06**4.7★**▲ 84%**](https://www.amazon.com/dp/B0GFSSQ7L8) [**Slenily Little Girls Soft Cotton Underwear Kids Cool Breathable Comfort Panty Briefs Toddler Undies (Pack of 6) Size 4T**Slenily**$20.96**4.8★**▲ 76%**](https://www.amazon.com/dp/B07WMFKBQ3) [**Fruit of the Loom girls Cotton Underwear Multipacks Briefs 20 Pack - Basic Assorted 6 US**Fruit of the Loom**$18.91**4.7★**▲ 74%**](https://www.amazon.com/dp/B084DT36BP) [**Winging Day Little Girls Assorted Prints Cotton Panties Size 6 (6-Pack)**Winging Day**$17.00**4.7★**▲ 72%**](https://www.amazon.com/dp/B0CSXTPN1Z) [**BliBliTaTa Girls Underwear Soft Cotton Tagless Panties for Toddlers & Little Kids Comfort Breathable Briefs in Sizes 18-24 Months 2T 3T 4T 5T 6T 7 8 10 12 Years Old 8-Pack Colorful-Flowers-5**BliBliTaTa**$14.77**4.8★**▲ 62%**](https://www.amazon.com/dp/B0FNCPW8ZP)
**~~View all trending →~~**
## **What buyers say about size 5 girls underwear**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**20%
*“not too tight”*
**Quality-Overall**16%
*“Excellent quality”*
**Comfort-Overall**12%
*“Super comfortable”*
**Soft Feel**11%
*“Comfy and soft”*
**Value For Money**4%
*“Good price”*
**Material Quality**4%
*“The material is extremely soft”*
**Color**3%
*“Beautiful colors”*
**Design-Overall**3%
*“Cute designs”*
**Thickness**2%
*“Love the thick cotton”*
**Durability**2%
*“Very durable”*
### **What buyers complain about **
**Size-Overall**27%
*“Fits small”*
**Quality-Overall**7%
*“Inferior quality”*
**Advertised Vs Actual Product**7%
*“Misleading title”*
**Stretchability/Expandability/Elasticity**4%
*“stretch out very easily”*
**Waist Fit**4%
*“the waist band DUG in”*
**Durability**3%
*“Fell apart on the very first wear”*
**Stitch/Finish/Polish**3%
*“Poor stitching”*
**Thickness**2%
*“The waist band is thicker than other underwear”*
**Color**2%
*“princesses that were not just white”*
**Gap/Hole**2%
*“our main issue is the leg holes being too big”*
### **Top return reasons **
**Size-Overall**65%
**Waist Fit**10%
**Advertised Vs Actual Product**4%
**Material Quality**4%
**Thigh Fit**3%
**Length**1%
**Color**1%
**Thin**1%
**Value For Money**1%
**Quality-Overall**1%
## **Common questions**
- **Is size 5 girls underwear profitable to sell on Amazon United States?**
- The niche generates $103K/yr across 60 tracked products. 7 of 9 products launched in the last 360 days are still selling. 90-day search growth is +8.9%. Flapen's verdict: Worth a look (55/100).
- **How competitive is the size 5 girls underwear niche?**
- 25 brands and 34 sellers compete. The top 5 products take 29% of clicks and top 5 brands hold 56% of demand.
- **What do buyers complain about in size 5 girls underwear?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Advertised Vs Actual Product. The return rate is 1.3%.
- **When does demand for size 5 girls underwear peak?**
- Demand peaks in Jul–Aug; the busiest month runs 2.5× the quietest.
- **What does it cost to enter the size 5 girls underwear niche?**
- Listings span $9.30–$26.48; the average listing price is $15.03 (sweet spot $15–$100). The average incumbent carries 10,462 reviews — the moat a new listing must climb.
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