---
title: "6th Birthday Shirt Boy — $39K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/6th-birthday-shirt-boy"
last_updated: "2026-08-09T09:26:48.820Z"
locale: en
meta:
description: "Niche score 36/100 · $39K/yr market · 139K searches/yr · $14.40 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 36/100 · $39K/yr market · 139K searches/yr · $14.40 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "6th Birthday Shirt Boy — $39K/yr Amazon US Niche (2026) - Flapen"
---
# **6th birthday shirt boy**
**Skip it**
A small market ($39K/yr) — this niche doesn't clear our bar today.
Market size 10Growth 16Conversion 25Competition 77Returns 22Price range 35Avg price 70Brand share 46Review moat 76Quality gap 21
**Competition**
**Great****38%**
top-5 click share — an open shelf
**Review moat**
**Great****475.58**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Good****$14.40**
avg listing price — sweet spot $15–$100
**Brand share**
**Okay****78%**
top-5 brand share — brands hold most of the demand
**Price range**
**Okay****$7.58–$19.05**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Bad****2.0%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****6.0%**
return rate — above 5% kills the launch gate
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-18.2%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$39K**
$39K/yr · 139K searches
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, 6th birthday shirt boy is a $39K/yr Amazon United States market (139K searches/yr). The top 5 brands hold 78% of demand. Demand peaks in Sep. Verdict: Skip it — 36/100.
Data updated Jul 8, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **6th birthday shirt boy market data**
- **Units sold / yr**
- **3K–4K**
- avg 0–100/product
- **Revenue / yr**
- **$43K–$58K**
- units × avg price
- **Conversion rate**
- **2.0%**
- **Avg BSR**
- **#2,178**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **87%**
- **Out of stock**
- **2.3%**
- **Avg brand age**
- **24 months**
- **Avg seller age**
- **187 days**
## **Competition & brand share**
Clicks spread well past the top 5 (38% combined) — an open shelf where new products get seen.
**Brands**
**19 **▼falling
**Sellers**
**19**
**Top-5 brand share**
**78%**
Top 20: 100%
**Top-5 click share**
**38%**
Top 20: 71%
**Open market**
**18%**
- Unordinary Toddler43% - GLIGLITTR13% - AG AGUU10% - Tstars6% - The Children's Place5% - SOFEON5% - Open — no brand owns it (13 brands, 18%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -18.2% search growth over the last 90 days.
5K3KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/6th-birthday-shirt-boy/trend)
## **Top 6th birthday shirt boy search terms**
- **6th birthday shirt boy**62K/yr-21.5%1.0% conv. - **birthday boy shirt 6**37K/yr-11.1%1.3% conv. - **6 birthday shirt boy**12K/yr-26.3%1.6% conv. - **birthday shirt boy 6**8K/yr-27.9%1.7% conv. - **birthday dude shirt**7K/yr-12.1%0.7% conv. - **birthday shirt toddler boy**6K/yr-1.9%0.2% conv. - **birthday dude shirt boy**7K/yr-11.8%0.9% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/6th-birthday-shirt-boy/search-terms)
## **Top 6th birthday shirt boy 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%4%$2K8%$3K12%$5K16%$6K101001K10K 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**Unordinary Toddler Boys 6th Birthday Shirt (Charcoal Blue 7 Years)**Unordinary Toddler**$12.76**4.8★1,813 rev](https://www.amazon.com/dp/B089B39SJJ) [2**Birthday boy Shirt Toddler Construction Shirts Boys 2t 3t 4 Year Old Excavator Theme Party t-Shirt 5 Kids 6th Outdoor Play (US Age 7 Years French Blue - 6th)**Unordinary Toddler**$13.03**4.9★43 rev](https://www.amazon.com/dp/B0GPF44LJT) [3**Birthday boy Shirt Toddler Boys Outfit First Happy 2t 3t 4 Year Old 5 Kids 6th (Charcoal Black 12 Months)**Unordinary Toddler**$12.69**4.8★4,726 rev](https://www.amazon.com/dp/B08G1BW7B8) [4**Birthday boy Shirt Toddler Boys Outfit First Happy 12m 2t 3t 4 Year Old 5 Kids 6th Number Printed T-Shirt (US Age 7 Years Charcoal Black - 6th)**Unordinary Toddler**$14.05**4.8★39 rev](https://www.amazon.com/dp/B0GKY8Q47R) [5**SOFEON Birthday Boy Shirt Toddler Boy 2nd 3rd 4th 5th 6th Birthday T-Shirt Kids 2-6 Years Old Birthday Gift Tees Party Top(Green-6th 6T(130))**SOFEON**$14.90**4.5★65 rev](https://www.amazon.com/dp/B0DT68RPQY)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Birthday boy Shirt Toddler Construction Shirts Boys 2t 3t 4 Year Old Excavator Theme Party t-Shirt 5 Kids 6th Outdoor Play (US Age 7 Years French Blue - 6th)**Unordinary Toddler**$13.03**43 rev4mo ago](https://www.amazon.com/dp/B0GPF44LJT) [**GLIGLITTR Birthday Boy Shirt Birthday Dude Tshirt 2nd 3rd 4th 5th 6th 7th 8th Toddler Boys Bday Party Short Sleeve Outfit Top(Apricot 2-3T)**GLIGLITTR**$14.99**39 rev5mo ago](https://www.amazon.com/dp/B0GLP5DXWX) [**GLIGLITTR Birthday Boy Shirt Birthday Dude Tshirt 2nd 3rd 4th 5th 6th 7th 8th Toddler Boys Bday Party Short Sleeve Outfit Top(Green 6-7X)**GLIGLITTR**$14.74**39 rev5mo ago](https://www.amazon.com/dp/B0GLP2HSM8) [**GLIGLITTR Birthday Boy Shirt Birthday Dude Tshirt 2nd 3rd 4th 5th 6th 7th 8th Toddler Boys Bday Party Short Sleeve Outfit Top(Green 5-6X)**GLIGLITTR**$14.69**39 rev5mo ago](https://www.amazon.com/dp/B0GLNZZC4L) [**GLIGLITTR Birthday Boy Shirt Birthday Dude Tshirt 2nd 3rd 4th 5th 6th 7th 8th Toddler Boys Bday Party Short Sleeve Outfit Top(Sky Blue 5-6X)**GLIGLITTR**$14.88**39 rev5mo ago](https://www.amazon.com/dp/B0GLP661SZ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Birthday boy Shirt Toddler Boys Outfit First Happy 12m 2t 3t 4 Year Old 5 Kids 6th Number Printed T-Shirt (US Age 6 Years Charcoal Black - 5th)**Unordinary Toddler**$13.07**4.8★**▲ 51%**](https://www.amazon.com/dp/B0GKYCMYJP) [**Birthday boy Shirt Toddler Construction Shirts Boys 2t 3t 4 Year Old Excavator Theme Party t-Shirt 5 Kids 6th Outdoor Play (US Age 7 Years French Blue - 6th)**Unordinary Toddler**$13.03**4.9★**▲ 50%**](https://www.amazon.com/dp/B0GPF44LJT) [**Birthday boy Shirt Toddler Boys Outfit First Happy 12m 2t 3t 4 Year Old 5 Kids 6th Number Printed T-Shirt (US Age 7 Years Charcoal Black - 6th)**Unordinary Toddler**$14.05**4.8★**▲ 50%**](https://www.amazon.com/dp/B0GKY8Q47R) [**Tstars 6th Birthday Shirt for Boys or Girls - This Is What an Awesome 6 Year Old Looks Like Youth Kids T-Shirt Gift Medium Blue**Tstars**$14.89**4.6★**▲ 49%**](https://www.amazon.com/dp/B01GVFKQ1K) [**GLIGLITTR Birthday Boy Shirt Birthday Dude Tshirt 2nd 3rd 4th 5th 6th 7th 8th Toddler Boys Bday Party Short Sleeve Outfit Top(Green 6-7X)**GLIGLITTR**$14.74**4.6★**▲ 48%**](https://www.amazon.com/dp/B0GLP2HSM8)
**~~View all trending →~~**
## **What buyers say about 6th birthday shirt boy**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**36%
*“It fits true to size”*
**Quality-Overall**24%
*“Good quality”*
**Soft Feel**7%
*“Its very soft”*
**Color**7%
*“Beautiful color”*
**Material Quality**5%
*“the fabric is basic shirt material it was comfortable”*
**Value For Money**4%
*“Great for the price”*
**Design-Overall**3%
*“The design is simple”*
**Advertised Vs Actual Product**2%
*“As described”*
**Comfort-Overall**2%
*“Its comfortable, durable, and looks adorable for birthday celebrations”*
**Print Quality**2%
*“The screen print is high quality and looks great”*
### **What buyers complain about **
**Size-Overall**28%
*“Returned on the small side”*
**Quality-Overall**15%
*“Cheap”*
**Value For Money**13%
*“unfortunately paid nearly $20 for this product”*
**Material Quality**11%
*“It feels like a very cheap polyester”*
**Durability**5%
*“Had holes by the end of day”*
**Length**3%
*“wish it was a little longer”*
**Neck Fit**3%
*“have a very big neck looks like already used someone before I brought it”*
**Stitch/Finish/Polish**2%
*“The shirt is incredibly thin with poor stitching and loose threads”*
**Gap/Hole**2%
*“Had holes by the end of day”*
**Thickness**2%
*“Very thin”*
### **Top return reasons **
**Size-Overall**64%
**Length**11%
**Chest Fit**5%
**Material Quality**4%
**Color**2%
**Value For Money**2%
**Advertised Vs Actual Product**2%
**Sleeve Fit**2%
**Quality-Overall**1%
**Neck Fit**1%
## **Common questions**
- **Is 6th birthday shirt boy profitable to sell on Amazon United States?**
- The niche generates $39K/yr across 52 tracked products. 3 of 18 products launched in the last 360 days are still selling. 90-day search growth is -18.2%. Flapen's verdict: Skip it (36/100).
- **How competitive is the 6th birthday shirt boy niche?**
- 19 brands and 19 sellers compete. The top 5 products take 38% of clicks and top 5 brands hold 78% of demand.
- **What do buyers complain about in 6th birthday shirt boy?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Value For Money. The return rate is 6.0% — above our launch gate.
- **When does demand for 6th birthday shirt boy peak?**
- Demand peaks in Sep; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the 6th birthday shirt boy niche?**
- Listings span $7.58–$19.05; the average listing price is $14.40 (sweet spot $15–$100). The average incumbent carries 476 reviews — the moat a new listing must climb.
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