---
title: "Boys Long Sleeve Shirts Size 10-12 — $115K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/boys-long-sleeve-shirts-size-10-12"
last_updated: "2026-08-10T21:17:59.696Z"
locale: en
meta:
description: "Niche score 43/100 · $115K/yr market · 636K searches/yr · $18.85 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 43/100 · $115K/yr market · 636K searches/yr · $18.85 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Boys Long Sleeve Shirts Size 10-12 — $115K/yr Amazon US Niche (2026) - Flapen"
---
# **boys long sleeve shirts size 10-12**
**Skip it**
Soft demand (-74.1% this quarter) — this niche doesn't clear our bar today.
Market size 27Growth 0Conversion 12Competition 97Returns 9Price range 79Avg price 85Brand share 91Review moat 41Quality gap 24
**Competition**
**Incredible****11%**
top-5 click share — an open shelf
**Brand share**
**Great****44%**
top-5 brand share — no brand owns this niche
**Avg price**
**Great****$18.85**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$5.77–$52.29**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Okay****2,407.1**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Okay****$115K**
$115K/yr · 636K searches
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Bad****1.0%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****9.4%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-74.1%**
90-day search growth — must beat 0% to launch
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, boys long sleeve shirts size 10-12 is a $115K/yr Amazon United States market (636K searches/yr). The top 5 brands hold 44% of demand. Demand peaks in Sep–Oct–Nov–Dec. Verdict: Skip it — 43/100.
Data updated Jul 8, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **boys long sleeve shirts size 10-12 market data**
- **Units sold / yr**
- **10K–13K**
- avg 0–100/product
- **Revenue / yr**
- **$189K–$236K**
- units × avg price
- **Conversion rate**
- **1.0%**
- **Avg BSR**
- **#498**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **87%**
- **Out of stock**
- **19.6%**
- **Avg brand age**
- **38 months**
- **Avg seller age**
- **155 days**
## **Competition & brand share**
Clicks spread well past the top 5 (11% combined) — an open shelf where new products get seen.
**Brands**
**77 **▲rising
**Sellers**
**92**
**Top-5 brand share**
**44%**
Top 20: 75%
**Top-5 click share**
**11%**
Top 20: 28%
**Open market**
**55%**
- The Children's Place12% - Amazon Essentials12% - Real Essentials6% - Brix5% - AOTIK5% - Marvelous World4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -74.1% search growth over the last 90 days.
70K50KPrime Day '24Spike '24Black Friday '24Holiday '24Spike '25Prime Day '25Holiday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct, Nov, Dec · busiest ÷ quietest = 18.1×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/boys-long-sleeve-shirts-size-10-12/trend)
## **Top boys long sleeve shirts size 10-12 search terms**
- **camisa manga larga para nio**22K/yr+84.8%0.2% conv. - **kids long sleeve shirt**60K/yr-55.1%0.4% conv. - **5t long sleeve shirts boys**49K/yr-73.2%2.3% conv. - **boys long sleeve shirts size 10-12**139K/yr-90.1%1.1% conv. - **boys thermal shirt**48K/yr-77.3%0.7% conv. - **boys long sleeve shirts size 14-16**84K/yr-87.2%0.8% conv. - **youth long sleeve shirt**16K/yr-65.0%0.5% conv. - **long sleeve shirts for boys 10-12**14K/yr-49.0%0.8% conv. - **boys thermal long sleeve shirts**13K/yr-65.9%0.3% conv. - **boys long sleeve shirts size 6**49K/yr-89.7%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/boys-long-sleeve-shirts-size-10-12/search-terms)
## **Top boys long sleeve shirts size 10-12 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%1%$1K2%$2K3%$3K4%$5K101001K10K100K 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**Amazon Essentials Boys Long-Sleeve Cotton Thermal T-Shirt Base Layer Pack of 3 Grey Rugby Stripe/Mustard Yellow/Rust XX-Large**Amazon Essentials**$18.97**4.7★1,324 rev](https://www.amazon.com/dp/B08WLQJF5Y) [2**Marvelous World Boys Long Sleeve Solid Buttoned Cuffs Dress Shirt Kids Casual Button Down Shirts White Size 8**Marvelous World**$13.01**4.7★756 rev](https://www.amazon.com/dp/B0F24NJKL5) [3**Brix Boys Basic Long Sleeve -Tee 100% Cotton Crewneck 4-Pack Shirts.**Brix**$19.75**4.6★7,978 rev](https://www.amazon.com/dp/B07GZ35K5Z) [4**French Toast Boys Expandable Collar Button Down Dress Shirt with Long Sleeves (Standard & Husky) White 7**French Toast**$11.07**4.7★18,259 rev](https://www.amazon.com/dp/B00X9HNBRU) [5**Real Essentials 5 Pack: Boys Cotton Jersey Long Sleeve T-Shirt Uniform Kids Crew Neck Tee Top- Set 6 XS 4-5**Real Essentials**$36.25**4.3★74 rev](https://www.amazon.com/dp/B0FR7K3KSP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Simple Joys by Carters Toddler Boys 3- Pack Solid Pocket Long-Sleeve Tee Shirts Shirt grey/blue/navy 5T**Simple Joys by Carter's**$19.11**24,730 rev2mo ago](https://www.amazon.com/dp/B0795ZW8LJ) [**MagicSite Boys White Button Down Dress Shirt with Tie Little Kids Long Sleeve Button Up Shirt Size 10 for Big Boy**MagicSite**$13.70**548 rev5mo ago](https://www.amazon.com/dp/B0FR2VV8XM) [**Real Essentials 4 Pack: Boys Mesh Long Sleeve Athletic T-Shirt - Kids Teens Youth Active Tees Running Tops- Set 7 XS 4-5**Real Essentials**$31.16**139 rev9mo ago](https://www.amazon.com/dp/B0FVN9VZN2) [**Real Essentials 5 Pack: Boys Cotton Jersey Long Sleeve T-Shirt Uniform Kids Crew Neck Tee Top- Set 6 XS 4-5**Real Essentials**$36.25**74 rev9mo ago](https://www.amazon.com/dp/B0FR7K3KSP) [**NUMYEAN Boys Long Sleeve Dress Shirts Button Down Uniform Shirts with Chest Pocket Size 9-10 Years Blue**NUMYEAN**$11.18**147 rev11mo ago](https://www.amazon.com/dp/B0FCF6HRT8)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Real Essentials 4 Pack: Boys Mesh Long Sleeve Athletic T-Shirt - Kids Teens Youth Active Tees Running Tops- Set 7 XS 4-5**Real Essentials**$31.16**4.3★**▲ 322%**](https://www.amazon.com/dp/B0FVN9VZN2) [**Amazon Essentials Boys Long-Sleeve Cotton Thermal T-Shirt Base Layer Pack of 3 Dark Grey/Grey Rugby Stripe/White XX-Large**Amazon Essentials**$18.79**4.7★**▲ 306%**](https://www.amazon.com/dp/B0BFRHJ71C) [**The Childrens Place boys Long Sleeve Oxford Shirt Black Medium**The Children's Place**$9.50**4.6★**▲ 289%**](https://www.amazon.com/dp/B07MWMM37B) [**Amazon Essentials Boys Long-Sleeve Cotton Thermal T-Shirt Base Layer Pack of 3 Burgundy/Grey/Orange Rugby Stripe X-Small**Amazon Essentials**$15.22**4.7★**▲ 273%**](https://www.amazon.com/dp/B0BGM2QXKG) [**Marvelous World Boys Long Sleeve Solid Buttoned Cuffs Dress Shirt Kids Casual Button Down Shirts Black Size 8**Marvelous World**$13.12**4.7★**▲ 264%**](https://www.amazon.com/dp/B0F24MJ1VG)
**~~View all trending →~~**
## **What buyers say about boys long sleeve shirts size 10-12**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**22%
*“Fit perfect”*
**Quality-Overall**16%
*“Nice shirt, good quality”*
**Comfort-Overall**6%
*“Super comfortable”*
**Value For Money**6%
*“Excellent value”*
**Soft Feel**6%
*“Smooth and comfortable”*
**Material Quality**6%
*“Very soft material”*
**Warmth**4%
*“keeps you warm”*
**Color**3%
*“The colors were vibrant”*
**Washability**2%
*“theyve held up well through many washes”*
**Thickness**2%
*“Yes, it's on the thinner side”*
### **What buyers complain about **
**Size-Overall**26%
*“it was huge”*
**Thickness**4%
*“shirt is not see through it is thick enough”*
**Product Condition**4%
*“I received a used shirt”*
**Wrinkles**4%
*“Not So Wrinkle Free”*
**Material Quality**4%
*“Cheap material”*
**Color**4%
*“is yellowish all around”*
**Quality-Overall**3%
*“Junk”*
**Shrinkage Resistance**2%
*“SHRINKS”*
**Thin**2%
*“Very thin”*
**Transparency**1%
*“See-through”*
### **Top return reasons **
**Size-Overall**58%
**Sleeve Fit**10%
**Length**5%
**Chest Fit**4%
**Material Quality**4%
**Thin**3%
**Arm Fit**2%
**Color**2%
**Advertised Vs Actual Product**2%
**Waist Fit**1%
## **Common questions**
- **Is boys long sleeve shirts size 10-12 profitable to sell on Amazon United States?**
- The niche generates $115K/yr across 245 tracked products. 14 of 72 products launched in the last 360 days are still selling. 90-day search growth is -74.1%. Flapen's verdict: Skip it (43/100).
- **How competitive is the boys long sleeve shirts size 10-12 niche?**
- 77 brands and 92 sellers compete. The top 5 products take 11% of clicks and top 5 brands hold 44% of demand.
- **What do buyers complain about in boys long sleeve shirts size 10-12?**
- Top complaints mined from reviews: Size-Overall, Thickness, Product Condition. The return rate is 9.4% — above our launch gate.
- **When does demand for boys long sleeve shirts size 10-12 peak?**
- Demand peaks in Sep–Oct–Nov–Dec; the busiest month runs 18.1× the quietest.
- **What does it cost to enter the boys long sleeve shirts size 10-12 niche?**
- Listings span $5.77–$52.29; the average listing price is $18.85 (sweet spot $15–$100). The average incumbent carries 2,407 reviews — the moat a new listing must climb.
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