---
title: "Ninja Costume — £49K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/toys-games/ninja-costume"
last_updated: "2026-07-31T16:39:17.586Z"
locale: en
meta:
description: "Niche score 44/100 · £49K/yr market · 159K searches/yr · £17.78 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · £49K/yr market · 159K searches/yr · £17.78 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Ninja Costume — £49K/yr Amazon UK Niche (2026) - Flapen"
---
# **ninja costume**
**Skip it**
Soft demand (-79.4% this quarter) — this niche doesn't clear our bar today.
Market size 12Growth 0Conversion 22Competition 79Returns 53Price range 67Avg price 82Brand share 58Review moat 60Quality gap 63
**Avg price**
**Great****£17.78**
avg listing price — sweet spot $15–$100
**Competition**
**Great****36%**
top-5 click share — an open shelf
**Price range**
**Good****£6.00–£33.34**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****1,096.89**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Good****70%**
top-5 brand share — brands hold most of the demand
**Returns**
**Good****2.9%**
return rate — above 5% kills the launch gate
**Conversion**
**Bad****1.7%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****£49K**
£49K/yr · 159K searches
**Growth**
**Bad****-79.4%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, ninja costume is a £49K/yr Amazon United Kingdom market (159K searches/yr). The top 5 brands hold 70% of demand. Demand peaks in Mar–Oct–Nov. Verdict: Skip it — 44/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **ninja costume market data**
- **Units sold / yr**
- **3K–3K**
- avg 0–100/product
- **Revenue / yr**
- **£44K–£53K**
- units × avg price
- **Conversion rate**
- **1.7%**
- **Avg BSR**
- **#1,024**
- **Page quality**
- **0%**
- **Prime**
- **83%**
- **Sponsored**
- **83%**
- **Out of stock**
- **7.0%**
- **Avg brand age**
- **51 months**
- **Avg seller age**
- **192 days**
## **Competition & brand share**
Clicks spread well past the top 5 (36% combined) — an open shelf where new products get seen.
**Brands**
**16 **▲rising
**Sellers**
**33**
**Top-5 brand share**
**70%**
Top 20: 100%
**Top-5 click share**
**36%**
Top 20: 79%
**Open market**
**25%**
- Spooktacular Creations26% - Banxidi15% - SATKULL12% - Aomig10% - Morph8% - BSBUY5%
## **Demand & seasonality**
Weekly Amazon search volume, last 92 weeks — -79.4% search growth over the last 90 days.
25K15KSpike '25Spike '26 seasonNovDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Mar, Oct, Nov · busiest ÷ quietest = 17.9×
[**Open Trend **](https://flapen.com/research/uk/toys-games/ninja-costume/trend)
## **Top ninja costume search terms**
- **ninja costume kids**66K/yr-82.5%1.8% conv. - **ninja costume**39K/yr-72.5%0.8% conv. - **kids ninja costume**22K/yr-78.1%2.6% conv. - **ninja outfit**7K/yr-63.4%1.2% conv. - **ninja outfit kids**6K/yr-72.8%3.1% conv. - **ninja kids costume**7K/yr-89.7%0.6% conv. - **boys ninja costume**7K/yr-91.2%0.4% conv. - **ninja halloween costumes for boys**4K/yr-95.8%0.0% conv. [**All search terms **](https://flapen.com/research/uk/toys-games/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%3%£1K6%£3K9%£4K12%£6K1101001K10K100K 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**Aomig Kids Halloween Fancy Dress Costume with Ninja Accessories Warrior Muscle Costume for Boys Girls Luxury Role Play Outfit for Halloween Cosplay Theme Party (M)**Aomig**£11.51**4.6★1,008 rev](https://www.amazon.co.uk/dp/B0BC93PDB6) [2**Spooktacular Creations Halloween Golden Ninja fighter costume for kids Toddlers Boys (Medium (8-10 yrs))**Spooktacular Creations**£24.43**4.5★1,345 rev](https://www.amazon.co.uk/dp/B0989LLNM7) [3**Spooktacular Creations Boys Ninja Deluxe Costume for Kids Halloween Ninja Cosplay Costume for Boys and Girls**Spooktacular Creations**£16.36**4.6★10,073 rev](https://www.amazon.co.uk/dp/B075BLPK16) [4**SATKULL Kids Ninja Costumes Halloween Ninja Costume Set for Boy Deluxe Ninjas Role Playing Suit(Kids-S-4/5T Black)**SATKULL**£15.16**4.5★380 rev](https://www.amazon.co.uk/dp/B0BL3LSF85) [5**Banxidi Ninja Kidz Boys Tracksuit Hoodies Kids Sweatshirt Long Sleeve for 2-piece Sets Sportswear Clothing 2-13Years black-150CM**Banxidi**£21.49**4.2★70 rev](https://www.amazon.co.uk/dp/B0CLGYW5B8)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**BSBUY Ninja Costume Kids Halloween Ninja Fancy Dress Costume with Ninja Accessories Warrior Ninja Muscle Costume for Boys Girls Luxury Ninja Role Play outfit for Halloween Cosplay Theme Party(M)**BSBUY**£11.67**4 rev3mo ago](https://www.amazon.co.uk/dp/B0GXVSDJY3) [**BSBUY Ninja Costume Kids Halloween Ninja Fancy Dress Costume with Ninja Accessories Warrior Ninja Muscle Costume for Boys Girls Luxury Ninja Role Play outfit for Halloween Cosplay Theme Party(L)**BSBUY**£11.17**22 rev8mo ago](https://www.amazon.co.uk/dp/B0G3PVG8XT) [**GRACEART Mens Black Ninja Costume Japanese Samurai Swordsman Uniform Suit Halloween Cosplay Outfit**GRACEART**£33.34**16 rev1y ago](https://www.amazon.co.uk/dp/B0F99DH73X) [**Banxidi Ninja Kidz Boys Tracksuit Hoodies Kids Sweatshirt Long Sleeve for 2-piece Sets Sportswear Clothing 2-13Years black-150CM**Banxidi**£21.49**70 rev2y ago](https://www.amazon.co.uk/dp/B0CLGYW5B8) [**Banxidi Ninja Kidz Boys Tracksuit Hoodies Black 130CM**Banxidi**£22.18**70 rev2y ago](https://www.amazon.co.uk/dp/B0CLH27QS5)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Banxidi Ninja Kidz Boys Tracksuit Hoodies Kids Sweatshirt Long Sleeve for 2-piece Sets Sportswear Clothing 2-13Years black-110CM**Banxidi**£19.99**4.2★**▲ 829%**](https://www.amazon.co.uk/dp/B0CLGZP799) [**GRACEART Mens Black Ninja Costume Japanese Samurai Swordsman Uniform Suit Halloween Cosplay Outfit**GRACEART**£33.34**4.3★**▲ 805%**](https://www.amazon.co.uk/dp/B0F99DH73X) [**Banxidi Ninja Kidz Boys Tracksuit Hoodies Black 130CM**Banxidi**£22.18**4.2★**▲ 803%**](https://www.amazon.co.uk/dp/B0CLH27QS5) [**BSBUY Ninja Costume Kids Halloween Ninja Fancy Dress Costume with Ninja Accessories Warrior Ninja Muscle Costume for Boys Girls Luxury Ninja Role Play outfit for Halloween Cosplay Theme Party(M)**BSBUY**£11.67**4.7★**▲ 800%**](https://www.amazon.co.uk/dp/B0GXVSDJY3) [**Karate Suit Uniform Gi Kit with Belt by Athletics Gear | Polyester Cotton Blend Light Weight for Kids Men & Women (Black 000/110 cm)**Athletics Gear AG**£16.44**4.4★**▲ 588%**](https://www.amazon.co.uk/dp/B08DPVYJS2)
**~~View all trending →~~**
## **What buyers say about ninja costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**25%
*“Great size”*
**Value For Money**22%
*“Value for money”*
**Quality-Overall**19%
*“Best Quality”*
**Advertised Vs Actual Product**13%
*“Product came as described”*
**Gifting Purpose**7%
*“Rccellent presentmade my grandson happy”*
**Durability**2%
*“and durable”*
**Material Quality**2%
*“All accessories are made of plastic, which is safe, non-toxic, and durable”*
### **What buyers complain about **
**Size-Overall**48%
*“The size was too small as well”*
**Quality-Overall**31%
*“It not been made well”*
**Advertised Vs Actual Product**5%
*“not the red advertised”*
**Durability**3%
*“The eye hole has frayed significantly”*
**Strength**3%
*“sadly this ninja suit is not made of strong stuff”*
**Stitch/Finish/Polish**3%
*“the costume started to come undone at the seam at the back below the zip”*
### **Top return reasons **
**Size-Overall**80%
**Quality-Overall**9%
**Material Quality**3%
**Stitch/Finish/Polish**2%
**Durability**1%
**Functionality-Overall**1%
**Touch/Button Controls**1%
**Product Condition**1%
**Advertised Vs Actual Product**1%
**Strap/String Quality**1%
## **Common questions**
- **Is ninja costume profitable to sell on Amazon United Kingdom?**
- The niche generates £49K/yr across 47 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -79.4%. Flapen's verdict: Skip it (44/100).
- **How competitive is the ninja costume niche?**
- 16 brands and 33 sellers compete. The top 5 products take 36% of clicks and top 5 brands hold 70% of demand.
- **What do buyers complain about in ninja costume?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Advertised Vs Actual Product. The return rate is 2.9%.
- **When does demand for ninja costume peak?**
- Demand peaks in Mar–Oct–Nov; the busiest month runs 17.9× the quietest.
- **What does it cost to enter the ninja costume niche?**
- Listings span £6.00–£33.34; the average listing price is £17.78 (sweet spot $15–$100). The average incumbent carries 1,097 reviews — the moat a new listing must climb.
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