---
title: "Boys Halloween Costumes Size 8-10 — $133K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/boys-halloween-costumes-size-8-10"
last_updated: "2026-08-10T21:06:39.342Z"
locale: en
meta:
description: "Niche score 46/100 · $133K/yr market · 683K searches/yr · $32.95 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · $133K/yr market · 683K searches/yr · $32.95 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Boys Halloween Costumes Size 8-10 — $133K/yr Amazon US Niche (2026) - Flapen"
---
# **boys halloween costumes size 8-10**
**Skip it**
Weak search conversion (0.6%) — this niche doesn't clear our bar today.
Market size 30Growth 14Conversion 7Competition 88Returns 23Price range 71Avg price 95Brand share 95Review moat 46Quality gap 33
**Brand share**
**Incredible****36%**
top-5 brand share — no brand owns this niche
**Avg price**
**Incredible****$32.95**
avg listing price — sweet spot $15–$100
**Competition**
**Great****27%**
top-5 click share — an open shelf
**Price range**
**Good****$6.54–$126.46**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Okay****1,868.85**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$133K**
$133K/yr · 683K searches
**Returns**
**Bad****5.6%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-21.6%**
90-day search growth — must beat 0% to launch
**Conversion**
**Bad****0.6%**
search→purchase rate — share of searches ending in a sale
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** 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 halloween costumes size 8-10 is a $133K/yr Amazon United States market (683K searches/yr). The top 5 brands hold 36% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 46/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **boys halloween costumes size 8-10 market data**
- **Units sold / yr**
- **3K–4K**
- avg 0–100/product
- **Revenue / yr**
- **$99K–$132K**
- units × avg price
- **Conversion rate**
- **0.6%**
- **Avg BSR**
- **#599**
- **Page quality**
- **0%**
- **Prime**
- **97%**
- **Sponsored**
- **87%**
- **Out of stock**
- **10.6%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **165 days**
## **Competition & brand share**
Clicks spread well past the top 5 (27% combined) — an open shelf where new products get seen.
**Brands**
**50 **—flat
**Sellers**
**96**
**Top-5 brand share**
**36%**
Top 20: 74%
**Top-5 click share**
**27%**
Top 20: 64%
**Open market**
**60%**
- mcuaeddu9% - Jazwares Costume Play8% - Marvel6% - Elite Sports6% - Spooktacular Creations6% - inkArts4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -21.6% search growth over the last 90 days.
300K200KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct · busiest ÷ quietest = 158.1×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/boys-halloween-costumes-size-8-10/trend)
## **Top boys halloween costumes size 8-10 search terms**
- **boys costumes 6-8**62K/yr-13.5%0.8% conv. - **boys costumes 10-12**86K/yr-47.6%0.3% conv. - **kid costumes boys**42K/yr-11.8%0.5% conv. - **costumes kids**20K/yr-11.1%0.2% conv. - **costumes for kids boys**32K/yr-18.6%0.3% conv. - **kids costumes boys**29K/yr-33.5%0.8% conv. - **costume boys**26K/yr-34.6%0.5% conv. - **costumes for boys 10-12**46K/yr-48.6%0.0% conv. - **halloween costumes for boys 10-12**100K/yr+79.9%0.0% conv. - **halloween costumes for kids boys**116K/yr-2.1%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/boys-halloween-costumes-size-8-10/search-terms)
## **Top boys halloween costumes size 8-10 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%3%$4K6%$8K9%$12K12%$16K101001K10K100K 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**mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (10-12 Years)**mcuaeddu**$36.83**4.6★169 rev](https://www.amazon.com/dp/B0GJNSYXH2) [2**Spooktacular Creations Halloween Ninja Costume Black Ninja Outfit Set for Kids Halloween Costumes with Accessories for Boys Dress Up and Role Play Party (Small 5-7 yrs)**Spooktacular Creations**$28.57**4.7★10,729 rev](https://www.amazon.com/dp/B075BLPK16) [3**Elite Sports IBJJF Ultra Light BJJ Brazilian Jiu Jitsu Gi for Kids with Preshrunk Fabric and Free Belt (Green 1)**Elite Sports**$44.22**4.8★5,654 rev](https://www.amazon.com/dp/B08B3ZFDKP) [4**inkArts Shark Blanket Hoodie - Adult Shark Sleeping Bag & Cozy Flannel Hoodie**inkArts**$20.13**4.2★4,873 rev](https://www.amazon.com/dp/B0CH9TWC91) [5**Marvel Integrated Spider-Man Official Youth Deluxe Zentai Costume - Deluxe Two-Way Stretch Spandex with Invisible Zippers and Wrist Openings for Added Convenience (M)**Jazwares Costume Play**$42.56**4.5★1,853 rev](https://www.amazon.com/dp/B0BQRVG5BL)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Spiderman Boys 2-Piece Snug-fit Cotton Holiday Pajama Set Soft & Cute for Kids MILES UNIFORM 6**Marvel**$15.32**3,269 rev2mo ago](https://www.amazon.com/dp/B0DDWD28DZ) [**Marvel Unisex Child Kids 2-piece Snug-fit Cotton Pajama Set Spider Costume 6 US**Marvel**$13.73**3,269 rev2mo ago](https://www.amazon.com/dp/B09D4TTPNZ) [**mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (10-12 Years)**mcuaeddu**$36.83**169 rev5mo ago](https://www.amazon.com/dp/B0GJNSYXH2) [**Nabobs Unisex Animal Onesie Costume Flannel Halloween Cosplay Costume - Homewear Animal Outfit Sky-blue**Nabobs**$11.93**76 rev9mo ago](https://www.amazon.com/dp/B0FT7GRRXP) [**Jeowoqao Costumes for Kids Boys Dress up Clothes for Role Play Boys Muscle Chest Dress up Costumes with Policeman Fireman Costume for Toddler Boy 3 4 5 6 Years Christmas Birthday Gifts**Jeowoqao**$28.79**87 rev10mo ago](https://www.amazon.com/dp/B0FNMB2RFV)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Nabobs Unisex Animal Onesie Costume Flannel Halloween Cosplay Costume - Homewear Animal Outfit Sky-blue**Nabobs**$11.93**4.7★**▲ 861%**](https://www.amazon.com/dp/B0FT7GRRXP) [**Spiderman Boys 2-Piece Snug-fit Cotton Holiday Pajama Set Soft & Cute for Kids MILES UNIFORM 6**Marvel**$15.32**4.7★**▲ 859%**](https://www.amazon.com/dp/B0DDWD28DZ) [**Elite Sports IBJJF Ultra Light BJJ Brazilian Jiu Jitsu Gi for Kids with Preshrunk Fabric and Free Belt (Green 1)**Elite Sports**$44.22**4.8★**▲ 855%**](https://www.amazon.com/dp/B08B3ZFDKP) [**mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (10-12 Years)**mcuaeddu**$36.83**4.6★**▲ 847%**](https://www.amazon.com/dp/B0GJNSYXH2) [**Elite Sports IBJJF Ultra Light BJJ Brazilian Jiu Jitsu Gi for Kids with Preshrunk Fabric and Free Belt (Black 1)**Elite Sports**$43.46**4.8★**▲ 843%**](https://www.amazon.com/dp/B08B3YTGWB)
**~~View all trending →~~**
## **What buyers say about boys halloween costumes size 8-10**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**18%
*“Amazing quality”*
**Fun/Entertainment Experience**15%
*“Fun for kids”*
**Size-Overall**13%
*“Fits good”*
**Value For Money**8%
*“Good value for the money”*
**Gifting Purpose**7%
*“Awesome gift”*
**Comfort-Overall**4%
*“is very comfortable”*
**Material Quality**3%
*“Material is soft”*
**Ease Of Use**3%
*“Easy to use”*
**Color**3%
*“Bright colors”*
**Advertised Vs Actual Product**2%
*“Works great, just as advertised”*
### **What buyers complain about **
**Size-Overall**19%
*“Pretty big”*
**Quality-Overall**18%
*“not well made”*
**Durability**11%
*“Breaks very easily”*
**Material Quality**4%
*“Not my favorite material”*
**Value For Money**3%
*“Feels slightly overpriced”*
**Stitch/Finish/Polish**3%
*“Stitching is very poor quality”*
**Strength**3%
*“Flimsy feeling”*
**Product Condition**2%
*“The item came used”*
**Strap/String Quality**2%
*“there is a bit of shedding of the strings”*
**Charging**2%
*“not able to recharge”*
### **Top return reasons **
**Size-Overall**68%
**Length**5%
**Advertised Vs Actual Product**4%
**Quality-Overall**3%
**Material Quality**3%
**Product Condition**2%
**Value For Money**2%
**Defective Material/Parts**2%
**Functionality-Overall**1%
**Sleeve Fit**1%
## **Common questions**
- **Is boys halloween costumes size 8-10 profitable to sell on Amazon United States?**
- The niche generates $133K/yr across 68 tracked products. 9 of 18 products launched in the last 360 days are still selling. 90-day search growth is -21.6%. Flapen's verdict: Skip it (46/100).
- **How competitive is the boys halloween costumes size 8-10 niche?**
- 50 brands and 96 sellers compete. The top 5 products take 27% of clicks and top 5 brands hold 36% of demand.
- **What do buyers complain about in boys halloween costumes size 8-10?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Durability. The return rate is 5.6% — above our launch gate.
- **When does demand for boys halloween costumes size 8-10 peak?**
- Demand peaks in Sep–Oct; the busiest month runs 158.1× the quietest.
- **What does it cost to enter the boys halloween costumes size 8-10 niche?**
- Listings span $6.54–$126.46; the average listing price is $32.95 (sweet spot $15–$100). The average incumbent carries 1,869 reviews — the moat a new listing must climb.
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