---
title: "Ninja Costume for Girls — $0/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/ninja-costume-for-girls"
last_updated: "2026-08-09T23:24:12.630Z"
locale: en
meta:
description: "Niche score 36/100 · $0/yr market · 79K searches/yr · $25.14 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 36/100 · $0/yr market · 79K searches/yr · $25.14 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Ninja Costume for Girls — $0/yr Amazon US Niche (2026) - Flapen"
---
# **ninja costume for girls**
**Skip it**
A small market ($0/yr) — this niche doesn't clear our bar today.
Market size 0Growth 15Conversion 0Competition 59Returns 22Price range 91Avg price 95Brand share 48Review moat 82Quality gap 43
**Avg price**
**Incredible****$25.14**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$13.73–$37.92**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****364.48**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Good****49%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Okay****76%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Returns**
**Bad****5.9%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-20.1%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$0**
$0/yr · 79K searches
**Conversion**
**Bad****0.0%**
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 for girls is a $0/yr Amazon United States market (79K searches/yr). The top 5 brands hold 76% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 36/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **ninja costume for girls market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$19K–$25K**
- units × avg price
- **Conversion rate**
- **0.0%**
- **Avg BSR**
- **#3,067**
- **Page quality**
- **0%**
- **Prime**
- **86%**
- **Sponsored**
- **55%**
- **Out of stock**
- **31.4%**
- **Avg brand age**
- **51 months**
- **Avg seller age**
- **188 days**
## **Competition & brand share**
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**14 **▲rising
**Sellers**
**49**
**Top-5 brand share**
**76%**
Top 20: 100%
**Top-5 click share**
**49%**
Top 20: 90%
**Open market**
**19%**
- California Costumes32% - Rubies19% - TEENAGE MUTANT NINJA12% - Fun Costumes7% - Kepblom7% - Morph5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -20.1% search growth over the last 90 days.
9K7KSpike '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep, Oct · busiest ÷ quietest = 21.1×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/ninja-costume-for-girls/trend)
## **Top ninja costume for girls search terms**
- **girl ninja costume**17K/yr-22.8%0.5% conv. - **girls ninja costume**21K/yr-20.2%0.9% conv. - **ninja costume for girls**11K/yr+34.0%0.6% conv. - **ninja girl**3K/yr-7.6%0.0% conv. - **ninja costume girls**8K/yr-36.7%0.5% conv. - **ninja girl costume**7K/yr-30.2%0.8% conv. - **pink ninja costume**6K/yr-45.4%0.0% conv. - **pink ninja costume for girls**4K/yr-16.1%0.0% conv. - **girl ninja costume kids 6-8**4K/yr-43.3%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/ninja-costume-for-girls/search-terms)
## **Top ninja costume for girls 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%5%$010%$015%$020%$01101001K10K 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**Rubies Childs Pink Crystal Ninja Costume Medium**Rubies**$17.75**4.4★306 rev](https://www.amazon.com/dp/B01MZIBITH) [2**California Costumes Ninja Nightfire Childs Medium**California Costumes**$32.87**4.6★162 rev](https://www.amazon.com/dp/B0CCXG5JQW) [3**Teenage Mutant Ninja Turtles Raphael Little Girls Scuba Cosplay Hooded Tulle Tutu Dress Green/Pink 7-8**TEENAGE MUTANT NINJA**$24.49**4.8★51 rev](https://www.amazon.com/dp/B0DY8DY4H8) [4**Fun Costumes Girls Rainbow Ninja Costume - Jumpsuit Dragon Drape Waist Sash & Iridescent Details Small Black**Fun Costumes**$37.92**4.2★44 rev](https://www.amazon.com/dp/B01LX6SX8U) [5**California Costumes Girls Black Ninja Costume Large**California Costumes**$23.53**4.6★818 rev](https://www.amazon.com/dp/B01L4OS3U4)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**California Costumes Girls Ninja-X Widow Strike Size L**California Costumes**$37.77**3 rev11mo ago](https://www.amazon.com/dp/B0FHXMG6XN) [**Teenage Mutant Ninja Turtles Raphael Little Girls Scuba Cosplay Hooded Tulle Tutu Dress Green/Pink 7-8**TEENAGE MUTANT NINJA**$24.49**51 rev1y ago](https://www.amazon.com/dp/B0DY8DY4H8) [**Teenage Mutant Ninja Turtles Raphael Toddler Girls Scuba Cosplay Hooded Tulle Tutu Dress Green/Pink 2T**TEENAGE MUTANT NINJA**$24.34**51 rev1y ago](https://www.amazon.com/dp/B0DY92W7ML) [**Bad boy league Girls Ninja Costumes Deluxe Girl Ninja Costume Set for Kids Halloween Role Playing Theme Parties(Kids-XL-10/12T Black)**Bad boy league**$21.54**23 rev1y ago](https://www.amazon.com/dp/B0DSSYFSC6) [**Onirii 66 Inch Kids Inflatable Punching Bag**Onirii**$27.68**238 rev1y ago](https://www.amazon.com/dp/B0D9NFVW8C)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Teenage Mutant Ninja Turtles Raphael Little Girls Scuba Cosplay Hooded Tulle Tutu Dress Green/Pink 7-8**TEENAGE MUTANT NINJA**$24.49**4.8★**▲ 810%**](https://www.amazon.com/dp/B0DY8DY4H8) [**Kepblom Girls Shiny Metallic Mock Neck Unitard Long Sleeve Zipper Back One Piece Bodysuit Costume**Kepblom**$28.23**4.4★**▲ 798%**](https://www.amazon.com/dp/B07MPF5491) [**Teenage Mutant Ninja Turtles Raphael Toddler Girls Scuba Cosplay Hooded Tulle Tutu Dress Green/Pink 2T**TEENAGE MUTANT NINJA**$24.34**4.8★**▲ 785%**](https://www.amazon.com/dp/B0DY92W7ML) [**Youth Ask Me About My Ninja Disguise Flip Halloween Costume Tee Black S**Crazy Dog T-Shirts**$13.73**4.5★**▲ 764%**](https://www.amazon.com/dp/B00KHBT2Q0) [**Onirii 66 Inch Kids Inflatable Punching Bag**Onirii**$27.68**4.4★**▲ 727%**](https://www.amazon.com/dp/B0D9NFVW8C)
**~~View all trending →~~**
## **What buyers say about ninja costume for girls**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**26%
*“Fits perfectly”*
**Quality-Overall**18%
*“Good quality”*
**Value For Money**10%
*“it's a great value for the price”*
**Fun/Entertainment Experience**8%
*“fun”*
**Durability**5%
*“Super durable my heavy handed daughter ground”*
**Efficiency**5%
*“Works well”*
**Leak-Proof**5%
*“So far no leaks thank goodness”*
**Material Quality**3%
*“Nice material”*
**Print Quality**3%
*“Logo done nicely”*
**Color**2%
*“Love the color and the idea,”*
### **What buyers complain about **
**Size-Overall**23%
*“It was very tell to big for my kids”*
**Leak-Proof**17%
*“it has a slow leak upon arrival”*
**Quality-Overall**13%
*“Junk / worthless”*
**Smell**12%
*“the gloves smelled”*
**Strength**8%
*“Not as sturdy as it looks”*
**Durability**8%
*“Not ideal for long term”*
**Inflation/Deflation**5%
*“it wouldnt stay inflated”*
**Advertised Vs Actual Product**4%
*“Not as described Junk”*
**Instructions/User Manual/Troubleshooting**2%
*“was missing instructions”*
### **Top return reasons **
**Size-Overall**61%
**Leak-Proof**4%
**Functionality-Overall**3%
**Length**3%
**Advertised Vs Actual Product**3%
**Material Quality**2%
**Defective Material/Parts**2%
**Sleeve Fit**2%
**Color**2%
**Width**2%
## **Common questions**
- **Is ninja costume for girls profitable to sell on Amazon United States?**
- The niche generates $0/yr across 29 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -20.1%. Flapen's verdict: Skip it (36/100).
- **How competitive is the ninja costume for girls niche?**
- 14 brands and 49 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 76% of demand.
- **What do buyers complain about in ninja costume for girls?**
- Top complaints mined from reviews: Size-Overall, Leak-Proof, Quality-Overall. The return rate is 5.9% — above our launch gate.
- **When does demand for ninja costume for girls peak?**
- Demand peaks in Sep–Oct; the busiest month runs 21.1× the quietest.
- **What does it cost to enter the ninja costume for girls niche?**
- Listings span $13.73–$37.92; the average listing price is $25.14 (sweet spot $15–$100). The average incumbent carries 364 reviews — the moat a new listing must climb.
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