hermione granger costume
Skip itSoft demand (-95.5% this quarter) — this niche doesn't clear our bar today.
Review moat
Good713.96avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Price range
Good£10.13–£24.87cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Good£13.43avg listing price — sweet spot $15–$100
Competition
Good48%top-5 click share — leaders hold, buyers still browse
Returns
Good2.8%return rate — above 5% kills the launch gate
Brand share
Okay88%top-5 brand share — brands hold most of the demand
Conversion
Bad0.6%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
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.Peak months: Mar, Oct · busiest ÷ quietest = 48.0×
Top hermione granger costume search terms
- hermione granger costume158K/yr
- hermione granger costume girls48K/yr
- hermione costume17K/yr
- hermione granger costume kids12K/yr
- harry potter costume girls8K/yr
- harry potter hermione costume6K/yr
- harry potter girls costume5K/yr
- ginny weasley costume6K/yr
- girls harry potter costume5K/yr
- hermione costume girls7K/yr
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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Rubies Official Harry Potter Gryffindor Classic Robe Costume Childs Size Age 9-10 Years Halloween
Rubies£12.264.4★2,790 rev
amscan 9912432 Childs Girls Officially Licensed Hermione Granger Book Day Week Deluxe Fancy Dress Costume Age 4-6 Years
amscan£10.134.4★1,579 rev
Rubies Official Warner Brothers Harry Potter Hermione Robe Set Childrens Costume Kids Fancy Dress Size 7-8 Years Halloween
Rubies£13.744.5★42 rev
Rubies Official Warner Brothers Harry Potter Hermione Robe Set Childrens Costume Kids Fancy Dress Size 9-10 Years Halloween
Rubies£13.364.5★42 rev
Rubies Official Warner Brothers Harry Potter Deluxe Hermione Childrens Costume Kids Fancy Dress Size 7-8 Years Halloween
Rubies£14.214.0★18 rev
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£10.8911 rev
DABAOOU 7pcs Wizard Costume Accessories Set Halloween Fancy Dress Outfit
DABAOOU£11.7426 rev
Rubies Official Warner Brothers Harry Potter Hermione Robe Set Childrens Costume Kids Fancy Dress Size 7-8 Years Halloween
Rubies£13.7442 rev
Rubies Official Warner Brothers Harry Potter Hermione Robe Set Childrens Costume Kids Fancy Dress Size 9-10 Years Halloween
Rubies£13.3642 rev
Rubies Official Warner Brothers Harry Potter Deluxe Hermione Childrens Costume Kids Fancy Dress Size 7-8 Years Halloween
Rubies£14.2118 rev
Trending
90-day click momentum
Harry Potter T Shirt | Girls T-Shirts | Hermione Granger Girls T Shirt | Pink 11-12 Years
Harry Potter£10.644.3★
DABAOOU 7pcs Wizard Costume Accessories Set Halloween Fancy Dress Outfit
DABAOOU£11.744.7★
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£15.854.3★
amscan 9911797 Childs Harry Potter Wizard Kit Fancy Dress Book Week Halloween Costume Outfit (Age 10-12 years)
amscan£11.624.6★
Rubies Official Warner Brothers Harry Potter Hermione Robe Set Childrens Costume Kids Fancy Dress Size 7-8 Years Halloween
Rubies£13.744.5★
What buyers say about hermione granger costume
What buyers praise and complain about, mined from review topics.What buyers love
“All so well made”
“size is good”
“Good value”
“Did the job”
“Polyester as expected”
“£10.99, voucher £10.44 at time of review, makes this a full of fun costume for a teen upwards”
“Good quality and comfortable”
“The quality of the items are fairly strong a durable”
“The colours are bright and bold, and they feel ok for basic costume props”
“The colours and overall design look fantastic and really bring the whole costume together”
What buyers complain about
“Bit pricey for the quality”
“size issue”
“Not as described”
“Cheap material”
“Just that the stickers did not stick to the skin”
“Only minor thing is the necklace makes your neck green which is expected as its not real”
“Broke after single use”
“the scarf very thin”
“though it felt a little flimsy”
Top return reasons
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.