---
title: "ninja costume — Niche Verdict: Skip it (43/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/clothing-shoes-jewelry/ninja-costume"
last_updated: "2026-07-14T05:21:46.283Z"
locale: en
meta:
  description: "weak search conversion (1.4%) — ninja costume doesn't clear our bar today."
  "og:description": "weak search conversion (1.4%) — ninja costume doesn't clear our bar today."
  "og:title": "ninja costume — Niche Verdict: Skip it (43/100) | Amazon United States - Flapen"
---

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# **ninja costume**

**Skip it**

Weak search conversion (1.4%) — this niche doesn't clear our bar today.

Market size 57Growth 19Conversion 17Competition 61Returns 23Price 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

**Returns**

**Bad****6.6%**

return rate — above 6% kills the launch gate

**Growth**

**Bad****-11.3%**

90-day search growth — must beat 0% to launch

**Conversion**

**Bad****1.4%**

search→purchase rate — share of searches ending in a sale

## **Competition**

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%**

**Open market**

**15%**

- Spooktacular Creations46% - GRACEART16% - Bosvin10% - California Costumes5% - Missanabie4% - SATKULL4% - Open — no brand owns it (8 brands, 15%)

## **Product shelf**

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 31 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)](https://m.media-amazon.com/images/I/41rpKXZ9B4L.jpg)**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](https://m.media-amazon.com/images/I/411QewnDrQL.jpg)**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)](https://m.media-amazon.com/images/I/51r4xqdv2vL.jpg)**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)](https://m.media-amazon.com/images/I/41m6LU1BsGL.jpg)**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](https://m.media-amazon.com/images/I/515WZu14TNL.jpg)**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](https://m.media-amazon.com/images/I/41v1T2NbYRL.jpg)**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](https://m.media-amazon.com/images/I/31ZYs9sjkiL.jpg)**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](https://m.media-amazon.com/images/I/411QewnDrQL.jpg)**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](https://m.media-amazon.com/images/I/411QewnDrQL.jpg)**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)](https://m.media-amazon.com/images/I/41kicQe4AgL.jpg)**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)](https://m.media-amazon.com/images/I/51Z6EsED5wL.jpg)**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](https://m.media-amazon.com/images/I/41v1T2NbYRL.jpg)**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) [![Elite Sports Bjj Gi for Men - Brazilian Jiu Jitsu Gi - Preshrunk sweat wicking Fabric - Machine washable - Free white Belt](https://m.media-amazon.com/images/I/511epFUO44L.jpg)**Elite Sports Bjj Gi for Men - Brazilian Jiu Jitsu Gi - Preshrunk sweat wicking Fabric - Machine washable - Free white Belt**Elite Sports**$58.11**4.7★**▲ 680%**](https://www.amazon.com/dp/B088VXRLSZ) [![Mens Black Ninja Costume Japanese Samurai Swordsman Uniform Suit Halloween Cosplay Outfit](https://m.media-amazon.com/images/I/411QewnDrQL.jpg)**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](https://m.media-amazon.com/images/I/411QewnDrQL.jpg)**Mens Black Ninja Costume Japanese Samurai Swordsman Uniform Suit Halloween Cosplay Outfit**GRACEART**$39.29**4.3★**▲ 561%**](https://www.amazon.com/dp/B0F99DH73X)

**~~View all trending →~~**

## **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×

## **Reviews**

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%