---
title: "Harry Potter Costume Adult — £62K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/toys-games/harry-potter-costume-adult"
last_updated: "2026-07-31T15:23:29.075Z"
locale: en
meta:
description: "Niche score 45/100 · £62K/yr market · 129K searches/yr · £17.31 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 45/100 · £62K/yr market · 129K searches/yr · £17.31 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Harry Potter Costume Adult — £62K/yr Amazon UK Niche (2026) - Flapen"
---
# **harry potter costume adult**
**Skip it**
Soft demand (-81.9% this quarter) — this niche doesn't clear our bar today.
Market size 16Growth 0Conversion 35Competition 63Returns 38Price range 67Avg price 81Brand share 77Review moat 90Quality gap 58
**Review moat**
**Great****208.97**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Great****£17.31**
avg listing price — sweet spot $15–$100
**Brand share**
**Great****58%**
top-5 brand share — no brand owns this niche
**Price range**
**Good****£6.90–£31.60**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****47%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Returns**
**Okay****4.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Okay****2.8%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****£62K**
£62K/yr · 129K searches
**Growth**
**Bad****-81.9%**
90-day search growth — must beat 0% to launch
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=uk&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United Kingdom niche tracking, harry potter costume adult is a £62K/yr Amazon United Kingdom market (129K searches/yr). The top 5 brands hold 58% of demand. Demand peaks in Mar–Oct–Nov. Verdict: Skip it — 45/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **harry potter costume adult market data**
- **Units sold / yr**
- **3K–4K**
- avg 0–100/product
- **Revenue / yr**
- **£52K–£69K**
- units × avg price
- **Conversion rate**
- **2.8%**
- **Avg BSR**
- **#1,234**
- **Page quality**
- **0%**
- **Prime**
- **88%**
- **Sponsored**
- **71%**
- **Out of stock**
- **25.4%**
- **Avg brand age**
- **46 months**
- **Avg seller age**
- **187 days**
## **Competition & brand share**
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**20 **▼falling
**Sellers**
**47**
**Top-5 brand share**
**58%**
Top 20: 100%
**Top-5 click share**
**47%**
Top 20: 87%
**Open market**
**35%**
- DABAOOU13% - Rubies13% - REDSTAR12% - Harry Potter10% - Kitimi9% - Kodepro8%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -81.9% search growth over the last 90 days.
20K15KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Mar, Oct, Nov · busiest ÷ quietest = 11.5×
[**Open Trend **](https://flapen.com/research/uk/toys-games/harry-potter-costume-adult/trend)
## **Top harry potter costume adult search terms**
- **harry potter costume adult**45K/yr-86.8%2.4% conv. - **harry potter fancy dress adults**10K/yr-1.8%2.7% conv. - **harry potter adult costume**11K/yr-78.0%3.4% conv. - **adult harry potter costume**12K/yr-82.1%3.0% conv. - **harry potter outfit adult**6K/yr-28.2%4.4% conv. - **harry potter robe adult**5K/yr-62.2%0.7% conv. - **harry potter cloak adult**5K/yr-73.6%1.2% conv. - **hermione granger costume adult**15K/yr-94.2%2.0% conv. - **gryffindor robe adult**5K/yr-76.0%4.0% conv. - **harry potter costume adult women**8K/yr-91.3%1.9% conv. [**All search terms **](https://flapen.com/research/uk/toys-games/harry-potter-costume-adult/search-terms)
## **Top harry potter costume adult 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%£5K12%£7K16%£10K1101001K10K 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**DABAOOU 7pcs Wizard Costume Accessories Set Halloween Fancy Dress Outfit**DABAOOU**£11.74**4.7★26 rev](https://www.amazon.co.uk/dp/B0G4K9CT9R) [2**5pc Adult Wizard Costume - Wizard Accessories With Black Hooded Cape Red and Yellow Scarf Magic Wand Red and Yellow Tie Black Glasses Fancy Dress for World Book Day or Halloween Costumes for Men**REDSTAR**£14.49**4.4★483 rev](https://www.amazon.co.uk/dp/B085926V6Z) [3**Rubies Official Deluxe Harry Potter Robe Adults Fancy Dress Unisex Costume Medium Halloween**Rubies**£17.73**4.1★918 rev](https://www.amazon.co.uk/dp/B003O68Q0S) [4**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★29 rev](https://www.amazon.co.uk/dp/B0D9K5D3LW) [5**Kitimi Costume Robe Adult 5PCS Wizard Costume Magic School Uniform Wizard Robe With Wand Tie Scarf Wizard Fancy Dress Cosplay Costume for Men and Women Halloween World Book Day Carnival Party**Kitimi**£20.42**4.5★32 rev](https://www.amazon.co.uk/dp/B0F9DKCX9S)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Webeasy 5PCS Magic Hooded Cloak with Wand Scarf Glasses Badge Wizard Costume Set for Unisex Adults**Webeasy**£19.86**4 rev7mo ago](https://www.amazon.co.uk/dp/B0GCYN6H98) [**UAVAUI Wizard Costume Set 8 PCS Wizard Robe with Magic Hat Stickers Necklace Spectacles Magic Wand and Scarf Halloween Costume Set for School Activities Party World Book Day Role-Playing**UAVAUI**£10.34**9 rev7mo ago](https://www.amazon.co.uk/dp/B0G4RHZCWX) [**DABAOOU 7pcs Wizard Costume Accessories Set Halloween Fancy Dress Outfit**DABAOOU**£11.74**26 rev8mo ago](https://www.amazon.co.uk/dp/B0G4K9CT9R) [**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) [**Harry Potter Gryffindor Unisex Black Hooded Bathrobe | Cosy Fleece Long Sleeve Loungewear for Relaxation | Movie House Merch Merch - Large**Harry Potter**£28.23**10 rev10mo ago](https://www.amazon.co.uk/dp/B0FS1YK2VR)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Harry Potter Dressing Gown Adult Fleece Hooded Dressing Gowns For Women Or Men (M Black)**Harry Potter**£17.83**4.7★**▲ 535%**](https://www.amazon.co.uk/dp/B08626M9NN) [**Harry Potter Womens Wearable Blanket Hoodie | Adults Gray Hooded Pullover with Hogwarts Graphic All Over Print | One Size Sherpa Lined Loungewear with Pockets | Classic Wizard Movie Merchandise Gift**Harry Potter**£31.60**4.8★**▲ 528%**](https://www.amazon.co.uk/dp/B0DFM1V6MT) [**Oerphh Wizard Costume Accessories Set Hooded Black Cape with Tie Glasses World Book Day Costumes (Red 125cm)**Oerphh**£7.21**4.4★**▲ 381%**](https://www.amazon.co.uk/dp/B0DSPFBFCY) [**Harry Potter Gryffindor Unisex Black Hooded Bathrobe | Cosy Fleece Long Sleeve Loungewear for Relaxation | Movie House Merch Merch - Large**Harry Potter**£28.23**5.0★**▲ 329%**](https://www.amazon.co.uk/dp/B0FS1YK2VR) [**Harry Potter Gryffindor Unisex Black Hooded Bathrobe | Cosy Fleece Long Sleeve Loungewear for Relaxation | Movie House Merch Merch - XX-Large**Harry Potter**£29.26**5.0★**▲ 257%**](https://www.amazon.co.uk/dp/B0FS24FDDY)
**~~View all trending →~~**
## **What buyers say about harry potter costume adult**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**29%
*“All so well made”*
**Value For Money**23%
*“Great value for money”*
**Size-Overall**13%
*“Fit beautifully”*
**Advertised Vs Actual Product**6%
*“complete the look”*
**Design-Overall**4%
*“The colours and overall design look fantastic and really bring the whole costume together”*
**Gifting Purpose**3%
*“Got this for my disabled nephew for Christmas as soon as he opened the present he put the Magicians outfit on”*
**Correct Contents**3%
*“Amazing costume, all items arrived as described and looked brilliant for a fancy dress party”*
**Fun/Entertainment Experience**3%
*“£10.99, voucher £10.44 at time of review, makes this a full of fun costume for a teen upwards”*
**Color**2%
*“The colours are bright and bold, and they feel ok for basic costume props”*
**Durability**2%
*“The quality of the items are fairly strong a durable”*
### **What buyers complain about **
**Size-Overall**21%
*“It is very, very long”*
**Quality-Overall**19%
*“Cheap looking”*
**Thickness**6%
*“Very thin material”*
**Adhesion/Stickiness**4%
*“Just that the stickers did not stick to the skin”*
**Material Quality**3%
*“The wand and glasses are cheap plastic”*
**Color**3%
*“Only minor thing is the necklace makes your neck green which is expected as its not real”*
**Durability**2%
*“unlikely to last much longer than that”*
**Value For Money**2%
*“Cheap and poor value for money”*
**Strength**2%
*“though it felt a little flimsy”*
### **Top return reasons **
**Size-Overall**63%
**Quality-Overall**16%
**Advertised Vs Actual Product**4%
**Material Quality**3%
**Functionality-Overall**2%
**Value For Money**2%
**Thin**2%
**Defective Material/Parts**1%
**Strength**1%
**Length**1%
## **Common questions**
- **Is harry potter costume adult profitable to sell on Amazon United Kingdom?**
- The niche generates £62K/yr across 34 tracked products. 0 of 8 products launched in the last 360 days are still selling. 90-day search growth is -81.9%. Flapen's verdict: Skip it (45/100).
- **How competitive is the harry potter costume adult niche?**
- 20 brands and 47 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 58% of demand.
- **What do buyers complain about in harry potter costume adult?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Thickness. The return rate is 4.0%.
- **When does demand for harry potter costume adult peak?**
- Demand peaks in Mar–Oct–Nov; the busiest month runs 11.5× the quietest.
- **What does it cost to enter the harry potter costume adult niche?**
- Listings span £6.90–£31.60; the average listing price is £17.31 (sweet spot $15–$100). The average incumbent carries 209 reviews — the moat a new listing must climb.
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