---
title: "Costumes for Boys 8-10 — $9K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/toys-games/costumes-for-boys-8-10"
last_updated: "2026-08-08T13:05:09.593Z"
locale: en
meta:
description: "Niche score 38/100 · $9K/yr market · 154K searches/yr · $31.66 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · $9K/yr market · 154K searches/yr · $31.66 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Costumes for Boys 8-10 — $9K/yr Amazon US Niche (2026) - Flapen"
---
# **costumes for boys 8-10**
**Skip it**
A small market ($9K/yr) — this niche doesn't clear our bar today.
Market size 2Growth 95Conversion 2Competition 19Returns 14Price range 95Avg price 95Brand share 40Review moat 44Quality gap 37
**Growth**
**Incredible****+122.9%**
90-day search growth — must beat 0% to launch
**Avg price**
**Incredible****$31.66**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$20.14–$42.69**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Okay****2,081**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****81%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****78%**
top-5 click share — a locked-up shelf
**Returns**
**Bad****8.1%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$9K**
$9K/yr · 154K searches
**Conversion**
**Bad****0.2%**
search→purchase rate — share of searches ending in a sale
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)") [** 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, costumes for boys 8-10 is a $9K/yr Amazon United States market (154K searches/yr). The top 5 brands hold 81% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 38/100.
Data updated Jul 31, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **costumes for boys 8-10 market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$24K–$32K**
- units × avg price
- **Conversion rate**
- **0.2%**
- **Avg BSR**
- **#3,024**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **80%**
- **Out of stock**
- **13.3%**
- **Avg brand age**
- **38 months**
- **Avg seller age**
- **166 days**
## **Competition & brand share**
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▼falling
**Sellers**
**13**
**Top-5 brand share**
**81%**
Top 20: 100%
**Top-5 click share**
**78%**
Top 20: 100%
**Open market**
**13%**
- mcuaeddu30% - inkArts24% - Spooktacular Creations11% - Gootus8% - Corespe8% - yfgkgkjg7% - Open — no brand owns it (2 brands, 13%)
## **Demand & seasonality**
Weekly Amazon search volume, last 87 weeks — +122.9% search growth over the last 90 days.
25K15KSpike '24Spike '25Prime Day '25Spike '26Prime Day '26 seasonSepOctNovDecJanJunJulAugSepOctNovDecJanMayJun
Peak months: Sep, Oct · busiest ÷ quietest = 191.6×
[**Open Trend **](https://flapen.com/research/us/toys-games/costumes-for-boys-8-10/trend)
## **Top costumes for boys 8-10 search terms**
- **boy halloween costumes 6-8**58K/yr+421.7%0.0% conv. - **costumes for boys 8-10**20K/yr+7.2%0.2% conv. - **halloween costumes for boys 8-10**52K/yr+370.9%0.0% conv. - **halloween costumes for boys 6-7**24K/yr+23.1%0.0% conv. - **boy halloween costumes 4-6**799/yr+0.0%0.0% conv. [**All search terms **](https://flapen.com/research/us/toys-games/costumes-for-boys-8-10/search-terms)
## **Top costumes for boys 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%10%$92820%$2K30%$3K40%$4K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 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 (6-8 Years)**mcuaeddu**$35.61**4.5★174 rev](https://www.amazon.com/dp/B0GJPGZRVK) [2**inkArts Shark Blanket Hoodie - Adult Shark Sleeping Bag & Cozy Flannel Hoodie**inkArts**$20.14**4.3★4,817 rev](https://www.amazon.com/dp/B0CH9TWC91) [3**Led Mask Halloween Costume Mask with Gesture Sensing Kids Toys Gifts**Gootus**$27.69**4.6★535 rev](https://www.amazon.com/dp/B0DLGZ8R1P) [4**Corespe Kids Dragon Costume Set with Tail and Mask Boys Halloween Dragon Cosplay Dress Up Outfits (Blue Medium(8-10 Years))**Corespe**$31.55**4.5★119 rev](https://www.amazon.com/dp/B0FLDL4YM4) [5**yfgkgkjg Unisex Kids Onesie Animal Pajamas One Piece Cosplay Costume Sleepwear Girls Boys Halloween Christmas (8-10Years)**yfgkgkjg**$23.25**4.6★750 rev](https://www.amazon.com/dp/B0CHDPJGQF)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (6-8 Years)**mcuaeddu**$35.61**174 rev6mo ago](https://www.amazon.com/dp/B0GJPGZRVK) [**mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (8-10 Years)**mcuaeddu**$36.31**174 rev6mo ago](https://www.amazon.com/dp/B0GJNRGK4C) [**Corespe Kids Dragon Costume Set with Tail and Mask Boys Halloween Dragon Cosplay Dress Up Outfits (Blue Medium(8-10 Years))**Corespe**$31.55**119 rev11mo ago](https://www.amazon.com/dp/B0FLDL4YM4) [**Led Mask Halloween Costume Mask with Gesture Sensing Kids Toys Gifts**Gootus**$27.69**535 rev1y ago](https://www.amazon.com/dp/B0DLGZ8R1P) [**Metemot Kids Army Costume for Boys Military Army Costume with Army Toys Solider Boy Dress up Halloween Costumes for Boys**Metemot**$38.13**231 rev2y ago](https://www.amazon.com/dp/B0D4LDWVM1)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**yfgkgkjg Unisex Kids Onesie Animal Pajamas One Piece Cosplay Costume Sleepwear Girls Boys Halloween Christmas (8-10Years)**yfgkgkjg**$23.25**4.6★**▲ 857%**](https://www.amazon.com/dp/B0CHDPJGQF) [**mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (6-8 Years)**mcuaeddu**$35.61**4.5★**▲ 852%**](https://www.amazon.com/dp/B0GJPGZRVK) [**mcuaeddu Demogorgon Onesie Halloween Costume Costume Warm Long Sleeve Costume (8-10 Years)**mcuaeddu**$36.31**4.5★**▲ 846%**](https://www.amazon.com/dp/B0GJNRGK4C) [**inkArts Shark Blanket Hoodie - Adult Shark Sleeping Bag & Cozy Flannel Hoodie**inkArts**$20.14**4.3★**▲ 456%**](https://www.amazon.com/dp/B0CH9TWC91) [**Corespe Kids Dragon Costume Set with Tail and Mask Boys Halloween Dragon Cosplay Dress Up Outfits (Blue Medium(8-10 Years))**Corespe**$31.55**4.5★**▲ 180%**](https://www.amazon.com/dp/B0FLDL4YM4)
**~~View all trending →~~**
## **What buyers say about costumes for boys 8-10**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**19%
*“Amazing quality”*
**Soft Feel**12%
*“Very soft and cozy for my 12 year old daughter who got a Medium”*
**Size-Overall**9%
*“Fits perfect”*
**Gifting Purpose**8%
*“Makes a fun gift”*
**Comfort-Overall**7%
*“comfortable”*
**Advertised Vs Actual Product**5%
*“Exactly as described”*
**Value For Money**4%
*“Great buy”*
**Ease Of Use**4%
*“Easy to use”*
**Warmth**3%
*“cozy for year round use”*
**Material Quality**3%
*“The material feels nice on the skin, and it is perfect for relaxing, sleeping, or just having fun”*
### **What buyers complain about **
**Size-Overall**34%
*“runs small”*
**Durability**14%
*“it kept tearing”*
**Quality-Overall**5%
*“not well made”*
**Advertised Vs Actual Product**4%
*“The description says nothing about the item being used”*
**Material Quality**4%
*“The material was very cheap”*
**Stitch/Finish/Polish**3%
*“The stitching is poor”*
**Gap/Hole**3%
*“Holes in it”*
**Value For Money**3%
*“This is extremely cheap for the price”*
**Noise Level**3%
*“Gun is loud”*
**Thickness**2%
*“I understand the material isnt very thick”*
### **Top return reasons **
**Size-Overall**64%
**Length**12%
**Gap/Hole**4%
**Advertised Vs Actual Product**2%
**Material Quality**2%
**Stitch/Finish/Polish**2%
**Sleeve Fit**2%
**Product Condition**1%
**Arm Fit**1%
**Shoulder Fit**1%
## **Common questions**
- **Is costumes for boys 8-10 profitable to sell on Amazon United States?**
- The niche generates $9K/yr across 10 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is +122.9%. Flapen's verdict: Skip it (38/100).
- **How competitive is the costumes for boys 8-10 niche?**
- 8 brands and 13 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 81% of demand.
- **What do buyers complain about in costumes for boys 8-10?**
- Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 8.1% — above our launch gate.
- **When does demand for costumes for boys 8-10 peak?**
- Demand peaks in Sep–Oct; the busiest month runs 191.6× the quietest.
- **What does it cost to enter the costumes for boys 8-10 niche?**
- Listings span $20.14–$42.69; the average listing price is $31.66 (sweet spot $15–$100). The average incumbent carries 2,081 reviews — the moat a new listing must climb.
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