---
title: "Rumi Costume — £483K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/toys-games/rumi-costume"
last_updated: "2026-07-31T07:20:43.698Z"
locale: en
meta:
description: "Niche score 54/100 · £483K/yr market · 1.3M searches/yr · £22.95 avg price. Soft demand (-56.4% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · £483K/yr market · 1.3M searches/yr · £22.95 avg price. Soft demand (-56.4% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Rumi Costume — £483K/yr Amazon UK Niche (2026) - Flapen"
---
# **rumi costume**
**Worth a look**
Shows a sweet-spot price point ($22.95 avg), but soft demand (-56.4% this quarter) keeps it on the watch list.
Market size 59Growth 0Conversion 20Competition 74Returns 67Price range 78Avg price 95Brand share 34Review moat 94Quality gap 90
**Avg price**
**Incredible****£22.95**
avg listing price — sweet spot $15–$100
**Review moat**
**Great****118.42**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Great****4.1★**
avg incumbent rating — lower means beatable quality
**Price range**
**Great****£10.60–£31.74**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****40%**
top-5 click share — leaders hold, buyers still browse
**Returns**
**Good****2.3%**
return rate — above 5% kills the launch gate
**Market size**
**Good****£483K**
£483K/yr · 1.3M searches
**Brand share**
**Okay****84%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Bad****1.6%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-56.4%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, rumi costume is a £483K/yr Amazon United Kingdom market (1.3M searches/yr). The top 5 brands hold 84% of demand. Verdict: Worth a look — 54/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **rumi costume market data**
- **Units sold / yr**
- **13K–15K**
- avg 100–250/product
- **Revenue / yr**
- **£287K–£344K**
- units × avg price
- **Conversion rate**
- **1.6%**
- **Avg BSR**
- **#201**
- **Page quality**
- **0%**
- **Prime**
- **97%**
- **Sponsored**
- **42%**
- **Out of stock**
- **20.1%**
- **Avg brand age**
- **15 months**
- **Avg seller age**
- **198 days**
## **Competition & brand share**
The top 5 products take 40% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**11 **▲rising
**Sellers**
**34**
**Top-5 brand share**
**84%**
Top 20: 100%
**Top-5 click share**
**40%**
Top 20: 83%
**Open market**
**12%**
- Rubies38% - Tangsenyu18% - Atorcher18% - Kitimi7% - shyhand4% - Metaparty4% - Open — no brand owns it (5 brands, 12%)
## **Demand**
Weekly Amazon search volume, last 45 weeks — -56.4% search growth over the last 90 days.
150K100KSpike '25Spike '26Sep '25Nov '25Dec '25Feb '26Apr '26May '26
[**Open Trend **](https://flapen.com/research/uk/toys-games/rumi-costume/trend)
## **Top rumi costume search terms**
- **rumi costume kids**834K/yr-56.2%1.4% conv. - **rumi costume**364K/yr-50.2%0.8% conv. - **kpop demon hunters costume rumi**63K/yr-69.8%1.1% conv. - **rumi kpop demon hunters costume**78K/yr-76.5%0.8% conv. [**All search terms **](https://flapen.com/research/uk/toys-games/rumi-costume/search-terms)
## **Top rumi 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%10%£48K20%£97K30%£145K40%£193K1101001K 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**Rubies Official Netflix K-Pop Demon Hunters Deluxe Rumi Golden Child Costume Kids Fancy Dress Size Age 7-8 Years**Rubies**£21.06**4.2★304 rev](https://www.amazon.co.uk/dp/B0FVLVZ9QP) [2**Atorcher Girls Halloween Costume Black and Yellow Polyester Top and Pants Set for Cosplay Events and Parties**Atorcher**£21.17**4.1★39 rev](https://www.amazon.co.uk/dp/B0FR8V9ZBJ) [3**Tangsenyu Kids Rumi Costume for Girls Halloween Outfit Include Jacket T-shirt and Shorts**Tangsenyu**£31.74**4.1★96 rev](https://www.amazon.co.uk/dp/B0FP9C1ZLY) [4**Rubies Official Netflix K-Pop Demon Hunters Rumi Child Costume Kids Fancy Dress Size Age 7-8 Years**Rubies**£20.22**3.9★91 rev](https://www.amazon.co.uk/dp/B0G3QDYYKX) [5**Rubies Official Netflix K-Pop Demon Hunters Deluxe Rumi Golden Child Costume Kids Fancy Dress Size Age 6+ Years**Rubies**£21.23**4.2★304 rev](https://www.amazon.co.uk/dp/B0FVY4S9B5)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**shyhand 3PCS Girls Anime Costume Kids Anime Cosplay Halloween Outfit for Fancy Party Carnival Theme Dress Up (XLarge-140cm)**shyhand**£24.87**2 rev2mo ago](https://www.amazon.co.uk/dp/B0H149VK9G) [**Luchild Kids Cosplay Costume Girls Dress Up Stage Outfits with Top Coat Pants 74Pcs Stickers Kids Pop Cosplay Themed Costumes Halloween Carnival Masquerade Dress Up Party for Little Girls**Luchild**£22.22**0 rev3mo ago](https://www.amazon.co.uk/dp/B0GYHZR1LL) [**Metaparty Pop Costumes World Book Day Costumes with Top Jacket Shorts for World Book Day (Black 130)**Metaparty**£17.82**2 rev4mo ago](https://www.amazon.co.uk/dp/B0GKP9HKY1) [**K-p0p D-Dem0n H-Hunters Costume Kids Girls Ani-me H-Hunters Outfits Pop Singers Coat Top Shorts Dance Stage Role Play Outfit Shorts & T-Shirt Christmas Carnival Dress Up Party Cosplay (Orange 130)**JIASHA**£18.76**14 rev5mo ago](https://www.amazon.co.uk/dp/B0GQ9W9VCF) [**nezafly Anime Cosplay Costume Kids Girls Black Stage Outfits Set Halloween**nezafly**£28.64**17 rev5mo ago](https://www.amazon.co.uk/dp/B0GLPB94WL)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**shyhand 3PCS Girls Anime Costume Kids Anime Cosplay Halloween Outfit for Fancy Party Carnival Theme Dress Up (XLarge-140cm)**shyhand**£24.87**4.5★**▲ 218%**](https://www.amazon.co.uk/dp/B0H149VK9G) [**Luchild Kids Cosplay Costume Girls Dress Up Stage Outfits with Top Coat Pants 74Pcs Stickers Kids Pop Cosplay Themed Costumes Halloween Carnival Masquerade Dress Up Party for Little Girls**Luchild**£22.22**0.0★**▲ 217%**](https://www.amazon.co.uk/dp/B0GYHZR1LL) [**Rubies Official Netflix K-Pop Demon Hunters Deluxe Rumi Golden Child Costume Kids Fancy Dress Size Age 11-13 Years**Rubies**£21.17**4.2★**▲ 209%**](https://www.amazon.co.uk/dp/B0FVMLVCN5) [**K-p0p D-Dem0n H-Hunters Costume Kids Girls Ani-me H-Hunters Outfits Pop Singers Coat Top Shorts Dance Stage Role Play Outfit Shorts & T-Shirt Christmas Carnival Dress Up Party Cosplay (Orange 130)**JIASHA**£18.76**4.4★**▲ 201%**](https://www.amazon.co.uk/dp/B0GQ9W9VCF) [**Rubies Official Netflix K-Pop Demon Hunters Deluxe Rumi Golden Child Costume Kids Fancy Dress Size Age 6+ Years**Rubies**£21.23**4.2★**▲ 196%**](https://www.amazon.co.uk/dp/B0FVY4S9B5)
**~~View all trending →~~**
## **What buyers say about rumi costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**23%
*“Overall it is a well made”*
**Size-Overall**21%
*“fits as shown in the size chart”*
**Value For Money**8%
*“Good value”*
**Gifting Purpose**6%
*“Present”*
**Advertised Vs Actual Product**6%
*“Better than I expected”*
**Comfort-Overall**4%
*“is very comfortable”*
**Material Quality**3%
*“Its made from a comfortable material that allows for plenty of movement”*
**Color**3%
*“Great color”*
**Ease Of Use**3%
*“has already had plenty of use”*
**Hair Styling**3%
*“A good product for rumi hair”*
### **What buyers complain about **
**Size-Overall**25%
*“It doesn't fit or look right”*
**Value For Money**20%
*“Way over priced”*
**Quality-Overall**16%
*“Very poor quality control”*
**Material Quality**8%
*“Very cheap material”*
**Thickness**4%
*“It's not overally thick”*
**Suitability Long Hair**4%
*“Its pulled a huge clump of my daughters hair”*
**Durability**3%
*“Broken already 2 days in”*
**Add-Ons/Attachments**3%
*“the attachments all broke on the first wear”*
**Advertised Vs Actual Product**2%
*“Doesnt look anything like the pictures”*
**Grip**2%
*“Grips are so small the dont stay in hair”*
### **Top return reasons **
**Size-Overall**72%
**Quality-Overall**14%
**Material Quality**3%
**Advertised Vs Actual Product**2%
**Suitability Short Hair**1%
**Value For Money**1%
**Weight Heavy**1%
**Defective Material/Parts**1%
**Stitch/Finish/Polish**1%
**Thin**1%
## **Common questions**
- **Is rumi costume profitable to sell on Amazon United Kingdom?**
- The niche generates £483K/yr across 33 tracked products. 13 of 33 products launched in the last 360 days are still selling. 90-day search growth is -56.4%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the rumi costume niche?**
- 11 brands and 34 sellers compete. The top 5 products take 40% of clicks and top 5 brands hold 84% of demand.
- **What do buyers complain about in rumi costume?**
- Top complaints mined from reviews: Size-Overall, Value For Money, Quality-Overall. The return rate is 2.3%.
- **What does it cost to enter the rumi costume niche?**
- Listings span £10.60–£31.74; the average listing price is £22.95 (sweet spot $15–$100). The average incumbent carries 118 reviews — the moat a new listing must climb.
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