grinch costume
Skip itSoft demand (-51.9% this quarter) — this niche doesn't clear our bar today.
Review moat
Incredible34.72avg incumbent reviews — the moat a new listing must climb
Avg price
Incredible£30.16avg listing price — sweet spot $15–$100
Quality gap
Great4.0★avg incumbent rating — lower means beatable quality
Price range
Great£13.06–£66.66cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Okay64%top-5 click share — leaders hold, buyers still browse
Brand share
Okay86%top-5 brand share — brands hold most of the demand
Market size
Bad£90K£90K/yr · 498K searches
Returns
Bad6.4%return rate — above 5% kills the launch gate
Conversion
Bad0.6%search→purchase rate — share of searches ending in a sale
Growth
Bad-51.9%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, grinch costume is a £90K/yr Amazon United Kingdom market (498K searches/yr). The top 5 brands hold 86% of demand. Demand peaks in Nov–Dec. Verdict: Skip it — 38/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
grinch costume market data
- Units sold / yr
- 4K–5K
- avg 100–250/product
- Revenue / yr
- £121K–£151K
- units × avg price
- Conversion rate
- 0.6%
- Avg BSR
- #4,918
- Page quality
- 0%
- Prime
- 83%
- Sponsored
- 78%
- Out of stock
- 50.2%
- Avg brand age
- 38 months
- Avg seller age
- 204 days
Competition & brand share
The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.Brands
11 falling
Sellers
14
Top-5 brand share
86%
Top 20: 100%
Top-5 click share
64%
Top 20: 100%
Open market
10%
- shyhand36%
- The Grinch28%
- Infinity Gauntlet8%
- SINSEN7%
- Applysu6%
- Senua4%
- Open — no brand owns it (5 brands, 10%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -51.9% search growth over the last 90 days.Peak months: Nov, Dec · busiest ÷ quietest = 206.2×
Top grinch costume search terms
- grinch costume311K/yr
- the grinch costume43K/yr
- grinch costume adult53K/yr
- adult grinch costume29K/yr
- grinch outfit28K/yr
- grinch outfit adult11K/yr
- grinch suit5K/yr
- the grinch costume adult5K/yr
- mens grinch costume5K/yr
- grinch adult costume4K/yr
Top grinch 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 18 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
The Grinch Mens Fleece Hooded Onesie Fluffy Loungewear - Funny Gifts for Him (Green M)
The Grinch£20.994.6★200 rev
shyhand Adults Green Christmas Onesie Thief Hooded Pyjamas Costume Fluffy Loungewear for Home Halloween Xmas Pajama (UK Alpha L Regular Regular)
shyhand£20.414.5★3 rev
shyhand 7PCS Adult Santa Furry Monster Costume Deluxe Christmas Green Elf Outfit Gloves Hat Mask Xmas Fancy Dress Party Cosplay Suit (2XL)
shyhand£40.663.9★10 rev
Infinity Gauntlet Green Big Monster Costume for Kids Boys Christmas Monster Furry Outfits Christmas Cosplay Costume Party Santa Suit
Infinity Gauntlet£23.243.2★18 rev
SINSEN 7PCS Christmas Green Big Monster Costume Adult Cosplay Costume Luxury Santa Claus Santa Suits Outfits
SINSEN£46.364.1★133 rev
Newest
by launch dateshyhand Adults Green Christmas Onesie Thief Hooded Pyjamas Costume Fluffy Loungewear for Home Halloween Xmas Pajama (UK Alpha L Regular Regular)
shyhand£20.413 rev
HFAN Christmas Grinch mask Grinch Decorations Christmas Mask and Gloves With Red Hat Anime Cosplay Grinch Costume for Halloween Xmas Funny Carnival Party Full Face Latex Helmet Costume Props
HFAN£16.6815 rev
shyhand Adult Green Fluffy Onesie Christmas Couples Pyjamas Fleece Home Nightwear for Women Men (Small)
shyhand£20.162 rev
shyhand 7PCS Adult Santa Furry Monster Costume Deluxe Christmas Green Elf Outfit Gloves Hat Mask Xmas Fancy Dress Party Cosplay Suit (2XL)
shyhand£40.6610 rev
shyhand 5PCS Adult Monster Costume Christmas Green Furry Jumpsuit with Mask Scarf Gloves Shoe Deluxe Party Cosplay Outfit (Large)
shyhand£48.674 rev
Trending
90-day click momentumThe Grinch Mens Fleece Hooded Onesie Fluffy Loungewear - Funny Gifts for Him (Green M)
The Grinch£20.994.6★
shyhand Adult Green Fluffy Onesie Christmas Couples Pyjamas Fleece Home Nightwear for Women Men (Small)
shyhand£20.164.5★
The Grinch Hooded Wrap Blanket Soft Green Fleece with Novelty 3D Hood & Pompom - Cozy Wearable Throw - Size 120x150cm
The Grinch£14.115.0★
shyhand Adults Green Christmas Onesie Thief Hooded Pyjamas Costume Fluffy Loungewear for Home Halloween Xmas Pajama (UK Alpha L Regular Regular)
shyhand£20.414.5★
Funidelia The Grinch costume for men and women Official License Size L - XL The Grinch Films & Series - Fancy dress for adults for parties Carnival and Halloween
Funidelia£66.660.0★
What buyers say about grinch costume
What buyers praise and complain about, mined from review topics.What buyers love
“Its a great fit and good quality”
What buyers complain about
“I had to glue it back down with superglue”
Top return reasons
Common questions
- Is grinch costume profitable to sell on Amazon United Kingdom?
- The niche generates £90K/yr across 18 tracked products. 0 of 9 products launched in the last 360 days are still selling. 90-day search growth is -51.9%. Flapen's verdict: Skip it (38/100).
- How competitive is the grinch costume niche?
- 11 brands and 14 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 86% of demand.
- What do buyers complain about in grinch costume?
- Top complaints mined from reviews: Adhesion/Stickiness. The return rate is 6.4% — above our launch gate.
- When does demand for grinch costume peak?
- Demand peaks in Nov–Dec; the busiest month runs 206.2× the quietest.
- What does it cost to enter the grinch costume niche?
- Listings span £13.06–£66.66; the average listing price is £30.16 (sweet spot $15–$100). The average incumbent carries 35 reviews — the moat a new listing must climb.