---
title: "Hermione Granger Costume — £24K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/toys-games/hermione-granger-costume"
last_updated: "2026-07-31T15:17:53.867Z"
locale: en
meta:
description: "Niche score 36/100 · £24K/yr market · 278K searches/yr · £13.43 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 36/100 · £24K/yr market · 278K searches/yr · £13.43 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Hermione Granger Costume — £24K/yr Amazon UK Niche (2026) - Flapen"
---
# **hermione granger costume**
**Skip it**
Soft demand (-95.5% this quarter) — this niche doesn't clear our bar today.
Market size 6Growth 0Conversion 8Competition 61Returns 55Price range 67Avg price 62Brand share 29Review moat 70Quality gap 67
**Review moat**
**Good****713.96**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Price range**
**Good****£10.13–£24.87**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Good****£13.43**
avg listing price — sweet spot $15–$100
**Competition**
**Good****48%**
top-5 click share — leaders hold, buyers still browse
**Returns**
**Good****2.8%**
return rate — above 5% kills the launch gate
**Brand share**
**Okay****88%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Bad****0.6%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****£24K**
£24K/yr · 278K searches
**Growth**
**Bad****-95.5%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, hermione granger costume is a £24K/yr Amazon United Kingdom market (278K searches/yr). The top 5 brands hold 88% of demand. Demand peaks in Mar–Oct. Verdict: Skip it — 36/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **hermione granger costume market data**
- **Units sold / yr**
- **5K–6K**
- avg 100–250/product
- **Revenue / yr**
- **£67K–£81K**
- units × avg price
- **Conversion rate**
- **0.6%**
- **Avg BSR**
- **#1,330**
- **Page quality**
- **0%**
- **Prime**
- **89%**
- **Sponsored**
- **52%**
- **Out of stock**
- **12.2%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **195 days**
## **Competition & brand share**
The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**11 **▲rising
**Sellers**
**40**
**Top-5 brand share**
**88%**
Top 20: 100%
**Top-5 click share**
**48%**
Top 20: 93%
**Open market**
**9%**
- Rubies62% - amscan12% - Amazluck6% - Harry Potter4% - Wieerda3% - Kodepro3% - Open — no brand owns it (5 brands, 9%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -95.5% search growth over the last 90 days.
100K60KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Mar, Oct · busiest ÷ quietest = 48.0×
[**Open Trend **](https://flapen.com/research/uk/toys-games/hermione-granger-costume/trend)
## **Top hermione granger costume search terms**
- **hermione granger costume**158K/yr-95.2%1.0% conv. - **hermione granger costume girls**48K/yr-96.3%2.2% conv. - **hermione costume**17K/yr-95.8%1.5% conv. - **hermione granger costume kids**12K/yr-92.1%0.0% conv. - **harry potter costume girls**8K/yr-94.7%2.3% conv. - **harry potter hermione costume**6K/yr-92.9%1.3% conv. - **harry potter girls costume**5K/yr-93.7%0.4% conv. - **ginny weasley costume**6K/yr-94.2%0.5% conv. - **girls harry potter costume**5K/yr-94.8%2.3% conv. - **hermione costume girls**7K/yr-96.9%2.5% conv. [**All search terms **](https://flapen.com/research/uk/toys-games/hermione-granger-costume/search-terms)
## **Top hermione granger 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%5%£1K10%£2K15%£4K20%£5K101001K10K 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 Official Harry Potter Gryffindor Classic Robe Costume Childs Size Age 9-10 Years Halloween**Rubies**£12.26**4.4★2,790 rev](https://www.amazon.co.uk/dp/B07NFC66QP) [2**amscan 9912432 Childs Girls Officially Licensed Hermione Granger Book Day Week Deluxe Fancy Dress Costume Age 4-6 Years**amscan**£10.13**4.4★1,579 rev](https://www.amazon.co.uk/dp/B099SCJJM7) [3**Rubies Official Warner Brothers Harry Potter Hermione Robe Set Childrens Costume Kids Fancy Dress Size 7-8 Years Halloween**Rubies**£13.74**4.5★42 rev](https://www.amazon.co.uk/dp/B0FP5RM47J) [4**Rubies Official Warner Brothers Harry Potter Hermione Robe Set Childrens Costume Kids Fancy Dress Size 9-10 Years Halloween**Rubies**£13.36**4.5★42 rev](https://www.amazon.co.uk/dp/B0FP5R64FQ) [5**Rubies Official Warner Brothers Harry Potter Deluxe Hermione Childrens Costume Kids Fancy Dress Size 7-8 Years Halloween**Rubies**£14.21**4.0★18 rev](https://www.amazon.co.uk/dp/B0FP5NX3H6)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Wizard Costume Accessories 8 Pcs Cosplay Accessories Set with Magic Cloak Magic Wand Hat Scarf Tie Necklace Glasses Tattoo Sticker Fancy Dress Set for Kids and Adult Halloween Party World Book Day**Wieerda**£10.89**11 rev8mo ago](https://www.amazon.co.uk/dp/B0G4JQMGNG) [**DABAOOU 7pcs Wizard Costume Accessories Set Halloween Fancy Dress Outfit**DABAOOU**£11.74**26 rev8mo ago](https://www.amazon.co.uk/dp/B0G4K9CT9R) [**Rubies Official Warner Brothers Harry Potter Hermione Robe Set Childrens Costume Kids Fancy Dress Size 7-8 Years Halloween**Rubies**£13.74**42 rev11mo ago](https://www.amazon.co.uk/dp/B0FP5RM47J) [**Rubies Official Warner Brothers Harry Potter Hermione Robe Set Childrens Costume Kids Fancy Dress Size 9-10 Years Halloween**Rubies**£13.36**42 rev11mo ago](https://www.amazon.co.uk/dp/B0FP5R64FQ) [**Rubies Official Warner Brothers Harry Potter Deluxe Hermione Childrens Costume Kids Fancy Dress Size 7-8 Years Halloween**Rubies**£14.21**18 rev11mo ago](https://www.amazon.co.uk/dp/B0FP5NX3H6)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Harry Potter T Shirt | Girls T-Shirts | Hermione Granger Girls T Shirt | Pink 11-12 Years**Harry Potter**£10.64**4.3★**▲ 1000%**](https://www.amazon.co.uk/dp/B0CTKRHXFW) [**DABAOOU 7pcs Wizard Costume Accessories Set Halloween Fancy Dress Outfit**DABAOOU**£11.74**4.7★**▲ 480%**](https://www.amazon.co.uk/dp/B0G4K9CT9R) [**17 Pcs Adults Wizard Costume Accessories Set with Hooded Cape Wizard Hat Scarf Tie Glasses Wand Necklace Tattoo Sticker Harry Wizard Cosplay Outfit Fancy Dress for Halloween Party World Book Day**Kodepro**£15.85**4.3★**▲ 447%**](https://www.amazon.co.uk/dp/B0D9K5D3LW) [**amscan 9911797 Childs Harry Potter Wizard Kit Fancy Dress Book Week Halloween Costume Outfit (Age 10-12 years)**amscan**£11.62**4.6★**▲ 289%**](https://www.amazon.co.uk/dp/B0946WZZF7) [**Rubies Official Warner Brothers Harry Potter Hermione Robe Set Childrens Costume Kids Fancy Dress Size 7-8 Years Halloween**Rubies**£13.74**4.5★**▲ 173%**](https://www.amazon.co.uk/dp/B0FP5RM47J)
**~~View all trending →~~**
## **What buyers say about hermione granger costume**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**26%
*“All so well made”*
**Size-Overall**24%
*“size is good”*
**Value For Money**15%
*“Good value”*
**Advertised Vs Actual Product**7%
*“Did the job”*
**Material Quality**6%
*“Polyester as expected”*
**Fun/Entertainment Experience**4%
*“£10.99, voucher £10.44 at time of review, makes this a full of fun costume for a teen upwards”*
**Comfort-Overall**3%
*“Good quality and comfortable”*
**Durability**2%
*“The quality of the items are fairly strong a durable”*
**Color**2%
*“The colours are bright and bold, and they feel ok for basic costume props”*
**Design-Overall**2%
*“The colours and overall design look fantastic and really bring the whole costume together”*
### **What buyers complain about **
**Quality-Overall**17%
*“Bit pricey for the quality”*
**Size-Overall**16%
*“size issue”*
**Advertised Vs Actual Product**9%
*“Not as described”*
**Material Quality**9%
*“Cheap material”*
**Adhesion/Stickiness**5%
*“Just that the stickers did not stick to the skin”*
**Color**3%
*“Only minor thing is the necklace makes your neck green which is expected as its not real”*
**Durability**3%
*“Broke after single use”*
**Thickness**3%
*“the scarf very thin”*
**Strength**2%
*“though it felt a little flimsy”*
### **Top return reasons **
**Size-Overall**71%
**Quality-Overall**10%
**Material Quality**3%
**Advertised Vs Actual Product**3%
**Value For Money**2%
**Thin**2%
**Defective Material/Parts**2%
**Touch/Button Controls**1%
**Product Condition**1%
**Length**1%
## **Common questions**
- **Is hermione granger costume profitable to sell on Amazon United Kingdom?**
- The niche generates £24K/yr across 27 tracked products. 0 of 6 products launched in the last 360 days are still selling. 90-day search growth is -95.5%. Flapen's verdict: Skip it (36/100).
- **How competitive is the hermione granger costume niche?**
- 11 brands and 40 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 88% of demand.
- **What do buyers complain about in hermione granger costume?**
- Top complaints mined from reviews: Quality-Overall, Size-Overall, Advertised Vs Actual Product. The return rate is 2.8%.
- **When does demand for hermione granger costume peak?**
- Demand peaks in Mar–Oct; the busiest month runs 48.0× the quietest.
- **What does it cost to enter the hermione granger costume niche?**
- Listings span £10.13–£24.87; the average listing price is £13.43 (sweet spot $15–$100). The average incumbent carries 714 reviews — the moat a new listing must climb.
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