---
title: "Knight Costume Kids — £31K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/toys-games/knight-costume-kids"
last_updated: "2026-07-31T17:51:34.941Z"
locale: en
meta:
description: "Niche score 43/100 · £31K/yr market · 139K searches/yr · £17.55 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 43/100 · £31K/yr market · 139K searches/yr · £17.55 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Knight Costume Kids — £31K/yr Amazon UK Niche (2026) - Flapen"
---
# **knight costume kids**
**Skip it**
A small market ($31K/yr) — this niche doesn't clear our bar today.
Market size 8Growth 8Conversion 16Competition 70Returns 49Price range 82Avg price 81Brand share 43Review moat 80Quality gap 70
**Price range**
**Great****£9.57–£41.82**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****£17.55**
avg listing price — sweet spot $15–$100
**Review moat**
**Great****397.68**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Good****43%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Returns**
**Okay****3.1%**
return rate — above 5% kills the launch gate
**Brand share**
**Okay****79%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Bad****1.3%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****£31K**
£31K/yr · 139K searches
**Growth**
**Bad****-33.8%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, knight costume kids is a £31K/yr Amazon United Kingdom market (139K searches/yr). The top 5 brands hold 79% of demand. Verdict: Skip it — 43/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **knight costume kids market data**
- **Units sold / yr**
- **2K–3K**
- avg 0–100/product
- **Revenue / yr**
- **£35K–£44K**
- units × avg price
- **Conversion rate**
- **1.3%**
- **Avg BSR**
- **#1,312**
- **Page quality**
- **0%**
- **Prime**
- **87%**
- **Sponsored**
- **50%**
- **Out of stock**
- **10.2%**
- **Avg brand age**
- **41 months**
- **Avg seller age**
- **198 days**
## **Competition & brand share**
The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**14 **—flat
**Sellers**
**40**
**Top-5 brand share**
**79%**
Top 20: 100%
**Top-5 click share**
**43%**
Top 20: 82%
**Open market**
**16%**
- Wicked Costumes45% - Rubies11% - Morph9% - Spooktacular Creations7% - Generic7% - Smiffys5% - Open — no brand owns it (8 brands, 16%)
## **Demand**
Weekly Amazon search volume, last 21 weeks — -33.8% search growth over the last 90 days.
9K7KSpike '26Prime Day '26Mar '26Mar '26Apr '26May '26May '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/uk/toys-games/knight-costume-kids/trend)
## **Top knight costume kids search terms**
- **knight costume kids**71K/yr-40.4%1.6% conv. - **knight costume**51K/yr-11.6%0.7% conv. - **kids knight costume**17K/yr-38.8%1.3% conv. [**All search terms **](https://flapen.com/research/uk/toys-games/knight-costume-kids/search-terms)
## **Top knight costume kids 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%4%£1K8%£2K12%£4K16%£5K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Wicked Costumes Boys Medieval Knight Fancy Dress Costume Warrior Crusader Outfit for World Book Day School Plays Halloween & Parties - Medium 5-7 years**Wicked Costumes**£10.65**4.4★1,083 rev](https://www.amazon.co.uk/dp/B008MLJDV6) [2**Wicked Costumes Boys Deluxe Knight Fancy Dress Costume Medieval Warrior Crusader Armour Outfit for Kids- Large (8-10 years)**Wicked Costumes**£12.28**4.4★459 rev](https://www.amazon.co.uk/dp/B008MLJ1GI) [3**Wicked Costumes Boys Knight Costume Medieval Warrior Fancy Dress Outfit for World Book Day & School Events - Large (8-10 Years)**Wicked Costumes**£10.22**4.2★249 rev](https://www.amazon.co.uk/dp/B07RZ89S18) [4**Spooktacular Creations Kids Knight Costume Deluxe Set for Boys Halloween Party Dress Up and Cosplay Medium (8-10 yrs)**Spooktacular Creations**£21.54**4.6★1,517 rev](https://www.amazon.co.uk/dp/B07GWXDP83) [5**Rubies Official King Arthur Childs Costume Kids Fancy Dress Halloween Size Age 7-8**Rubies**£12.96**4.6★567 rev](https://www.amazon.co.uk/dp/B06WVSWWX4)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Adults Medieval Crusader Knight Costume English St George Fancy Dress with Tunic Red Cape Headpiece & Belt King Arthur Knight Outfit for Parties & Events**Generic**£23.31**0 rev3mo ago](https://www.amazon.co.uk/dp/B0GVNPDGG4) [**Morph Medieval Knight Costume For Boys Knight Costume Kids Halloween Costumes For Boys Warrior Costumes Kids XL**Morph**£19.48**74 rev11mo ago](https://www.amazon.co.uk/dp/B0DX2D4QZB) [**Boys Medieval Tunic Childrens Cosplay T-Shirts Costume Halloween Renaissance Viking Warrior Knight Tops Kids Medieval Costume Boys Solid Color Personality Shirts Comfortable**Generic**£12.96**1 rev1y ago](https://www.amazon.co.uk/dp/B0FFGYDGQ5) [**WIKITOT Roman Costume Kids Halloween Costumes for Boys Aged 5-13(M)**WIKITOT**£12.92**162 rev1y ago](https://www.amazon.co.uk/dp/B0DSFXCSHQ) [**Alipis Kids Knight Armor Play Set Helmet Chest Plate Sword Axe Shield & Arm Guards Pretend Role-Play Medieval Knight Costume for Boys & Girls**Alipis**£29.12**8 rev3y ago](https://www.amazon.co.uk/dp/B0CB3TL7N5)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Adults Medieval Crusader Knight Costume English St George Fancy Dress with Tunic Red Cape Headpiece & Belt King Arthur Knight Outfit for Parties & Events**Generic**£23.31**0.0★**▲ 238%**](https://www.amazon.co.uk/dp/B0GVNPDGG4) [**Boys Medieval Tunic Childrens Cosplay T-Shirts Costume Halloween Renaissance Viking Warrior Knight Tops Kids Medieval Costume Boys Solid Color Personality Shirts Comfortable**Generic**£12.96**5.0★**▲ 231%**](https://www.amazon.co.uk/dp/B0FFGYDGQ5) [**Wicked Costumes Boys Knight Costume Medieval Warrior Fancy Dress Outfit for World Book Day & School Events - Medium (57 Years)**Wicked Costumes**£9.57**4.2★**▲ 222%**](https://www.amazon.co.uk/dp/B07S2BPZCQ) [**Wicked Costumes Boys Medieval Knight Fancy Dress Costume Warrior Crusader Outfit for World Book Day School Plays Halloween & Parties - X-Large (11-13 Years)**Wicked Costumes**£11.14**4.4★**▲ 208%**](https://www.amazon.co.uk/dp/B07MCDBRHH) [**Wicked Costumes Boys Deluxe Knight Fancy Dress Costume Medieval Warrior Crusader Armour Outfit for Kids- Large (8-10 years)**Wicked Costumes**£12.28**4.4★**▲ 97%**](https://www.amazon.co.uk/dp/B008MLJ1GI)
**~~View all trending →~~**
## **What buyers say about knight costume kids**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**29%
*“Good quality, sizing is true to size”*
**Size-Overall**18%
*“Perfect fit”*
**Value For Money**14%
*“Great Value”*
**Advertised Vs Actual Product**10%
*“as the picture”*
**Fun/Entertainment Experience**8%
*“Fun for kids”*
**Comfort-Overall**5%
*“comfort comes up great”*
**Strength**4%
*“Sturdy set”*
**Material Quality**2%
*“Good material”*
**Quick Drying**1%
*“drys quickly for the next wearing just fabulous Maria”*
### **What buyers complain about **
**Size-Overall**27%
*“the helmet seems very small”*
**Advertised Vs Actual Product**25%
*“Doesnt include sword and shield which isnt immediately clear from the photos / description”*
**Durability**7%
*“fell apart within a few hours”*
**Quality-Overall**7%
*“rubbish”*
**Value For Money**4%
*“Bit disappointed for the price”*
**Wrinkles**4%
*“Will get wrinkle”*
**Material Quality**2%
*“a bit plastic”*
### **Top return reasons **
**Size-Overall**78%
**Quality-Overall**9%
**Advertised Vs Actual Product**2%
**Material Quality**2%
**Stitch/Finish/Polish**2%
**Defective Material/Parts**1%
**Strap/String Quality**1%
**Value For Money**1%
**Durability**1%
**Shape/Style**1%
## **Common questions**
- **Is knight costume kids profitable to sell on Amazon United Kingdom?**
- The niche generates £31K/yr across 38 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is -33.8%. Flapen's verdict: Skip it (43/100).
- **How competitive is the knight costume kids niche?**
- 14 brands and 40 sellers compete. The top 5 products take 43% of clicks and top 5 brands hold 79% of demand.
- **What do buyers complain about in knight costume kids?**
- Top complaints mined from reviews: Size-Overall, Advertised Vs Actual Product, Durability. The return rate is 3.1%.
- **What does it cost to enter the knight costume kids niche?**
- Listings span £9.57–£41.82; the average listing price is £17.55 (sweet spot $15–$100). The average incumbent carries 398 reviews — the moat a new listing must climb.
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