---
title: "Mario Costume Kids — £38K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/fashion/mario-costume-kids"
last_updated: "2026-07-31T14:54:21.425Z"
locale: en
meta:
description: "Niche score 38/100 · £38K/yr market · 101K searches/yr · £14.62 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · £38K/yr market · 101K searches/yr · £14.62 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Mario Costume Kids — £38K/yr Amazon UK Niche (2026) - Flapen"
---
# **mario costume kids**
**Skip it**
Soft demand (-88.4% this quarter) — this niche doesn't clear our bar today.
Market size 10Growth 0Conversion 32Competition 68Returns 51Price range 61Avg price 72Brand share 14Review moat 67Quality gap 65
**Avg price**
**Good****£14.62**
avg listing price — sweet spot $15–$100
**Competition**
**Good****44%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Good****832.17**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Price range**
**Good****£7.95–£26.15**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Good****3.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Okay****2.6%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Bad****95%**
top-5 brand share — brand-locked demand
**Market size**
**Bad****£38K**
£38K/yr · 101K searches
**Growth**
**Bad****-88.4%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, mario costume kids is a £38K/yr Amazon United Kingdom market (101K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Mar–Oct. Verdict: Skip it — 38/100.
Data updated Jul 23, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **mario costume kids market data**
- **Units sold / yr**
- **2K–3K**
- avg 100–250/product
- **Revenue / yr**
- **£29K–£37K**
- units × avg price
- **Conversion rate**
- **2.6%**
- **Avg BSR**
- **#699**
- **Page quality**
- **0%**
- **Prime**
- **79%**
- **Sponsored**
- **66%**
- **Out of stock**
- **15.4%**
- **Avg brand age**
- **35 months**
- **Avg seller age**
- **187 days**
## **Competition & brand share**
The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**9 **▲rising
**Sellers**
**47**
**Top-5 brand share**
**95%**
Top 20: 100%
**Top-5 click share**
**44%**
Top 20: 92%
**Open market**
**4%**
- Super Mario39% - Disguise28% - BSBUY17% - HENBRANDT8% - Kitimi3% - DiULi2% - Open — no brand owns it (3 brands, 4%)
## **Demand & seasonality**
Weekly Amazon search volume, last 72 weeks — -88.4% search growth over the last 90 days.
50K30KPrime Day '25Spike '25Spike '26 seasonMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Mar, Oct · busiest ÷ quietest = 31.2×
[**Open Trend **](https://flapen.com/research/uk/fashion/mario-costume-kids/trend)
## **Top mario costume kids search terms**
- **mario costume kids**60K/yr-89.9%1.8% conv. - **super mario costume kids**21K/yr-91.0%2.6% conv. - **kids mario costume**13K/yr-78.4%2.2% conv. - **mario kids costume**8K/yr-73.6%2.7% conv. [**All search terms **](https://flapen.com/research/uk/fashion/mario-costume-kids/search-terms)
## **Top mario 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%£2K8%£3K12%£5K16%£6K101001K10K 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**Disguise Mario Fancy Dress Intl**Disguise**£16.73**4.6★555 rev](https://www.amazon.co.uk/dp/B07KW5KJQN) [2**BSBUY Kids Super Plumber Costume Super Workman Fancy Dress Costume Moustache Brothers Outfit Super Bro Jumpsuit with Cap Beard and Gloves for Boys Girls Halloween Birthday Christmas Cosplay(Red-M)**BSBUY**£8.44**3.9★163 rev](https://www.amazon.co.uk/dp/B0FJXRBD7F) [3**Disguise Nintendo Super Mario Mario Jumpsuit for Kids Officially Licensed Includes Mario Hat Mario Fancy Dress for Kids Jumpsuit and Moustache Ages 7-8**Disguise**£14.78**4.6★555 rev](https://www.amazon.co.uk/dp/B099FFBN91) [4**Super Mario Onesie | Onesies for Boys | Fleece Pyjamas for Kids Multicoloured 7-8 Years**Super Mario**£21.60**4.7★1,726 rev](https://www.amazon.co.uk/dp/B08SMLS968) [5**BSBUY Kids Super Plumber Costume Super Workman Fancy Dress Costume Moustache Brothers Outfit Super Bro Jumpsuit with Cap Beard and Gloves for Boys Girls Halloween Birthday Christmas Cosplay(Red-S)**BSBUY**£8.73**3.9★163 rev](https://www.amazon.co.uk/dp/B0FJXP1WQD)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Super Mario Bomber Jacket Mario Luigi Bowser And Yoshi Boys Jacket Varsity Boys Jackets 9-10 Years**Super Mario**£20.12**16 rev3mo ago](https://www.amazon.co.uk/dp/B0GYFN6P8V) [**BSBUY Kids Super Plumber Costume Super Workman Fancy Dress Costume Moustache Brothers Outfit Super Bro Jumpsuit with Cap Beard and Gloves for Boys Girls Halloween Birthday Christmas Cosplay(Red-M)**BSBUY**£8.44**163 rev12mo ago](https://www.amazon.co.uk/dp/B0FJXRBD7F) [**BSBUY Kids Super Plumber Costume Super Workman Fancy Dress Costume Moustache Brothers Outfit Super Bro Jumpsuit with Cap Beard and Gloves for Boys Girls Halloween Birthday Christmas Cosplay(Red-S)**BSBUY**£8.73**163 rev12mo ago](https://www.amazon.co.uk/dp/B0FJXP1WQD) [**Super Bro Costume Kids Super Workman Fancy Dress Costume Set Kids Plumber Costumes with Red Top Dungarees Hat Mustaches Gloves Brooch Carnival Halloween Cosplay Costumes for Boys and GirlsXL**Kitimi**£14.26**10 rev1y ago](https://www.amazon.co.uk/dp/B0FG7CRSXQ) [**DiULi 4 PCS Yellow Halloween Costume Accessories Set Cosplay Fun Party Costume Cute Costume World Book Day Childrens Costume Including Hat Two Eyes Steampunk Goggles Gloves Strap Clips**DiULi**£7.95**82 rev1y ago](https://www.amazon.co.uk/dp/B0F59YN9HS)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Super Mario Bomber Jacket Mario Luigi Bowser And Yoshi Boys Jacket Varsity Boys Jackets 9-10 Years**Super Mario**£20.12**4.6★**▲ 590%**](https://www.amazon.co.uk/dp/B0GYFN6P8V) [**DiULi 4 PCS Yellow Halloween Costume Accessories Set Cosplay Fun Party Costume Cute Costume World Book Day Childrens Costume Including Hat Two Eyes Steampunk Goggles Gloves Strap Clips**DiULi**£7.95**4.0★**▲ 575%**](https://www.amazon.co.uk/dp/B0F59YN9HS) [**Super Mario Swimsuit for Boys | Blue Green Two Piece Top & Shorts Bathing Suit | Kids Gamer UV50+ Sun Safe Swimming Costume 5-6 Years**Super Mario**£16.19**4.6★**▲ 552%**](https://www.amazon.co.uk/dp/B0B42YK71Z) [**Super Mario Boys Pyjamas Grey 4-5 Years**Super Mario**£9.62**4.6★**▲ 530%**](https://www.amazon.co.uk/dp/B084257PP1) [**Super Mario Swimsuit for Boys | Blue Green Two Piece Top & Shorts Bathing Suit | Kids Gamer UV50+ Sun Safe Swimming Costume 3-4 Years**Super Mario**£15.63**4.6★**▲ 507%**](https://www.amazon.co.uk/dp/B0916GN43K)
**~~View all trending →~~**
## **What buyers say about mario costume kids**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**29%
*“these fit great”*
**Quality-Overall**23%
*“Good quality”*
**Value For Money**14%
*“Cant really complain at the price - excellent product for Halloween or parties”*
**Comfort-Overall**8%
*“comfortable for my son”*
**Material Quality**4%
*“Material thickness is fine”*
**Washability**4%
*“Washes well”*
**Fun/Entertainment Experience**4%
*“kids are very easily thrilled”*
### **What buyers complain about **
**Size-Overall**36%
*“comes up to small”*
**Quality-Overall**20%
*“Poor quality”*
**Value For Money**11%
*“Not impressed for the amount it cost”*
**Material Quality**6%
*“Disappointing, cheap material and does not come with the gloves or moustache, so picture is a little miss leading”*
**Durability**2%
*“already the seam has split”*
**Stretchability/Expandability/Elasticity**2%
*“Bottom part tighter than expected”*
**Thin**2%
*“very thin material”*
**Gap/Hole**2%
*“Next day a hole right be the zip”*
**Upholstery/Fabric Quality**2%
*“Felt a bit cheap fabric n quality n fasteners for dungarees not the best difficult for kids”*
**Adhesion/Stickiness**2%
*“moustache didnt stick at all”*
### **Top return reasons **
**Size-Overall**74%
**Quality-Overall**8%
**Material Quality**2%
**Defective Material/Parts**2%
**Advertised Vs Actual Product**2%
**Stitch/Finish/Polish**1%
**Inflation/Deflation**1%
**Length**1%
**Functionality-Overall**1%
**Product Condition**1%
## **Common questions**
- **Is mario costume kids profitable to sell on Amazon United Kingdom?**
- The niche generates £38K/yr across 29 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -88.4%. Flapen's verdict: Skip it (38/100).
- **How competitive is the mario costume kids niche?**
- 9 brands and 47 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 95% of demand.
- **What do buyers complain about in mario costume kids?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Value For Money. The return rate is 3.0%.
- **When does demand for mario costume kids peak?**
- Demand peaks in Mar–Oct; the busiest month runs 31.2× the quietest.
- **What does it cost to enter the mario costume kids niche?**
- Listings span £7.95–£26.15; the average listing price is £14.62 (sweet spot $15–$100). The average incumbent carries 832 reviews — the moat a new listing must climb.
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