---
title: "Ninja Costume — $431K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/ninja-costume"
last_updated: "2026-08-10T10:47:02.433Z"
locale: en
meta:
description: "Niche score 43/100 · $431K/yr market · 1.0M searches/yr · $31.29 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 43/100 · $431K/yr market · 1.0M searches/yr · $31.29 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Ninja Costume — $431K/yr Amazon US Niche (2026) - Flapen"
---
# **ninja costume**
**Skip it**
Weak search conversion (1.4%) — this niche doesn't clear our bar today.
Market size 57Growth 19Conversion 17Competition 61Returns 19Price range 92Avg price 95Brand share 39Review moat 38Quality gap 38
**Avg price**
**Incredible****$31.29**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$13.28–$58.11**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****49%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Good****$431K**
$431K/yr · 1.0M searches
**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
**Review moat**
**Okay****2,714.55**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-11.3%**
90-day search growth — must beat 0% to launch
**Returns**
**Bad****6.6%**
return rate — above 5% kills the launch gate
**Conversion**
**Bad****1.4%**
search→purchase rate — share of searches ending in a sale
**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, ninja costume is a $431K/yr Amazon United States market (1.0M searches/yr). The top 5 brands hold 81% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 43/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **ninja costume market data**
- **Units sold / yr**
- **13K–15K**
- avg 250–500/product
- **Revenue / yr**
- **$391K–$469K**
- units × avg price
- **Conversion rate**
- **1.4%**
- **Avg BSR**
- **#1,018**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **81%**
- **Out of stock**
- **9.3%**
- **Avg brand age**
- **51 months**
- **Avg seller age**
- **171 days**
## **Competition & brand share**
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**14 **▼falling
**Sellers**
**32**
**Top-5 brand share**
**81%**
Top 20: 100%
**Top-5 click share**
**49%**
Top 20: 87%
**Open market**
**15%**
- Spooktacular Creations46% - GRACEART16% - Bosvin10% - California Costumes5% - Missanabie4% - SATKULL4% - Open — no brand owns it (8 brands, 15%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -11.3% search growth over the last 90 days.
150K100KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct · busiest ÷ quietest = 26.2×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/ninja-costume/trend)
## **Top ninja costume search terms**
- **ninja costume**359K/yr-9.5%0.6% conv. - **ninja costume kids**270K/yr-39.2%1.2% conv. - **ninja costume kids 6-8**53K/yr-3.5%2.6% conv. - **kids ninja costume**65K/yr+2.3%1.6% conv. - **ninja outfit**21K/yr+15.2%0.3% conv. - **ninja suit**17K/yr-8.9%0.2% conv. - **ninja costumes**29K/yr-4.6%0.2% conv. - **ninja costume 4-6 years**4K/yr+147.1%2.4% conv. - **ninja suit for kids**7K/yr+1.8%1.4% conv. - **ninja outfit kids**4K/yr+52.9%1.5% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/ninja-costume/search-terms)
## **Top ninja costume 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%$43K20%$86K30%$129K40%$173K1101001K10K100K 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**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) [2**Mens Black Ninja Costume Japanese Samurai Swordsman Uniform Suit Halloween Cosplay Outfit**GRACEART**$39.63**4.3★16 rev](https://www.amazon.com/dp/B0F999GPX3) [3**Spooktacular Creations Halloween Ninja Costume Kids Black Red Ninja Dragon Jumpsuit Set Boys Halloween Costume for DressUp and RolePlay Party (Small 5-7 yrs)**Spooktacular Creations**$31.20**4.6★4,066 rev](https://www.amazon.com/dp/B08BWT2NQS) [4**Spooktacular Creations Golden Ninja Costume Set Ninja Jumpsuit with Foam Accessories for Kids Toddler Halloween Outfit for Ideas Cosplay Party (Small 5-7 yrs)**Spooktacular Creations**$32.66**4.6★1,377 rev](https://www.amazon.com/dp/B0989MN1NL) [5**Ninjia Costume for Boys & Girls - Kids Ninja Costume Suit with Deluxe Ninja Toys for Halloween Cospaly Role Playing (Gold & Black) 6-7 Years**Bosvin**$33.14**4.6★280 rev](https://www.amazon.com/dp/B0D2RVV8J1)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**ReliBeauty Green Ninja Kids Costume for Boys suit with Deluxe Ninja Accessories 120**ReliBeauty**$38.03**9 rev5mo ago](https://www.amazon.com/dp/B0GL965KTZ) [**California Costumes Boys Ninja-X Scorpion Strike Size M**California Costumes**$38.58**3 rev11mo ago](https://www.amazon.com/dp/B0FHY2FQL6) [**Mens Black Ninja Costume Japanese Samurai Swordsman Uniform Suit Halloween Cosplay Outfit**GRACEART**$39.63**16 rev1y ago](https://www.amazon.com/dp/B0F999GPX3) [**Mens Black Ninja Costume Japanese Samurai Swordsman Uniform Suit Halloween Cosplay Outfit**GRACEART**$39.29**16 rev1y ago](https://www.amazon.com/dp/B0F99DH73X) [**TOKYO REVENGERS Men Medieval Renaissance Pirate Costume Knight Cosplay Outfit LARP Costume Accessories Set (BK 2XL)**TOKYO REVENGERS**$35.63**67 rev1y ago](https://www.amazon.com/dp/B0F1MFXP1H)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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★**▲ 773%**](https://www.amazon.com/dp/B08B3ZFDKP) [**ReliBeauty Green Ninja Kids Costume for Boys suit with Deluxe Ninja Accessories 120**ReliBeauty**$38.03**4.6★**▲ 767%**](https://www.amazon.com/dp/B0GL965KTZ) [**Mens Black Ninja Costume Japanese Samurai Swordsman Uniform Suit Halloween Cosplay Outfit**GRACEART**$39.63**4.3★**▲ 623%**](https://www.amazon.com/dp/B0F999GPX3) [**Mens Black Ninja Costume Japanese Samurai Swordsman Uniform Suit Halloween Cosplay Outfit**GRACEART**$39.29**4.3★**▲ 561%**](https://www.amazon.com/dp/B0F99DH73X) [**TOKYO REVENGERS Men Medieval Renaissance Pirate Costume Knight Cosplay Outfit LARP Costume Accessories Set (BK 2XL)**TOKYO REVENGERS**$35.63**3.4★**▲ 410%**](https://www.amazon.com/dp/B0F1MFXP1H)
**~~View all trending →~~**
## **What buyers say about ninja costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**19%
*“Accessories good quality”*
**Size-Overall**18%
*“Gi length is perfect”*
**Comfort-Overall**15%
*“They are very comfortable”*
**Durability**7%
*“The gi feels durable and well-made, especially after multiple training sessions and washes”*
**Value For Money**6%
*“Great Value”*
**Material Quality**5%
*“great material”*
**Weight Light**4%
*“a lot lighter than I anticipated”*
**Color**3%
*“I love the color”*
**Ease Of Use**2%
*“It was easy to move around”*
**Fun/Entertainment Experience**2%
*“Fun Costume That Immediately Gets Kids Into Character”*
### **What buyers complain about **
**Size-Overall**10%
*“Fit was a bit large”*
**Product Condition**8%
*“supposedly brand new”*
**Material Quality**8%
*“Sun didnt like the fabric”*
**Value For Money**5%
*“Priced for a reason”*
**Allergies**5%
*“Itchy and cheap”*
**Ease Of Use**5%
*“way to hard to put on not worth it”*
**Quality-Overall**4%
*“QUALITY CONTROL needs to be involved”*
**Thickness**3%
*“It is thin material”*
**Durability**3%
*“Not good durability”*
**Pockets/Compartments**3%
*“came with a hole in the right pocket”*
### **Top return reasons **
**Size-Overall**63%
**Advertised Vs Actual Product**5%
**Material Quality**5%
**Quality-Overall**4%
**Color**4%
**Length**3%
**Product Condition**2%
**Value For Money**1%
**Waist Fit**1%
**Defective Material/Parts**1%
## **Common questions**
- **Is ninja costume profitable to sell on Amazon United States?**
- The niche generates $431K/yr across 31 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -11.3%. Flapen's verdict: Skip it (43/100).
- **How competitive is the ninja costume niche?**
- 14 brands and 32 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 81% of demand.
- **What do buyers complain about in ninja costume?**
- Top complaints mined from reviews: Size-Overall, Product Condition, Material Quality. The return rate is 6.6% — above our launch gate.
- **When does demand for ninja costume peak?**
- Demand peaks in Sep–Oct; the busiest month runs 26.2× the quietest.
- **What does it cost to enter the ninja costume niche?**
- Listings span $13.28–$58.11; the average listing price is $31.29 (sweet spot $15–$100). The average incumbent carries 2,715 reviews — the moat a new listing must climb.
## **Related niches in Clothing, Shoes & Jewelry**
- 72 [**first communion gifts for boys**](https://flapen.com/research/us/clothing-shoes-jewelry/first-communion-gifts-for-boys)$398K/yr+223.5%**Worth a look**- 72 [**fifa world cup 2026 tshirt**](https://flapen.com/research/us/clothing-shoes-jewelry/fifa-world-cup-2026-tshirt)$177K/yr>1,000%**Worth a look**- 72 [**american flag hat**](https://flapen.com/research/us/clothing-shoes-jewelry/american-flag-hat)$764K/yr+428.8%**Worth a look**- 72 [**white socks men**](https://flapen.com/research/us/clothing-shoes-jewelry/white-socks-men)$3.0M/yr+13.3%**Launch it**- 72 [**american flag overalls**](https://flapen.com/research/us/clothing-shoes-jewelry/american-flag-overalls)$662K/yr>1,000%**Worth a look**- 73 [**white ankle socks for men**](https://flapen.com/research/us/clothing-shoes-jewelry/white-ankle-socks-for-men)$448K/yr+88.3%**Worth a look**[**All Clothing, Shoes & Jewelry niches **](https://flapen.com/research/us/clothing-shoes-jewelry)