Is alien costume profitable to sell on Amazon United Kingdom?

The niche generates £103K/yr across 48 tracked products. 0 of 18 products launched in the last 360 days are still selling. 90-day search growth is -25.4%. Flapen's verdict: Worth a look (51/100).

How competitive is the alien costume niche?

32 brands and 51 sellers compete. The top 5 products take 37% of clicks and top 5 brands hold 57% of demand.

What do buyers complain about in alien costume?

Top complaints mined from reviews: Size-Overall, Thickness, Battery Inclusion. The return rate is 4.0%.

When does demand for alien costume peak?

Demand peaks in Oct–Nov; the busiest month runs 25.9× the quietest.

What does it cost to enter the alien costume niche?

Listings span £5.75–£34.85; the average listing price is £15.89 (sweet spot $15–$100). The average incumbent carries 148 reviews — the moat a new listing must climb.

alien costume

Worth a look

Shows a thin review moat (148 avg reviews), but soft demand (-25.4% this quarter) keeps it on the watch list.

Review moat

Great147.88

avg incumbent reviews — the moat a new listing must climb

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Competition

Great37%

top-5 click share — an open shelf

Brand share

Great57%

top-5 brand share — no brand owns this niche

Avg price

Great£15.89

avg listing price — sweet spot $15–$100

Price range

Good£5.75–£34.85

cheapest to priciest tracked listing — scored on the share inside $15–$100

Returns

Okay4.0%

return rate — above 5% kills the launch gate

Market size

Okay£103K

£103K/yr · 455K searches

Conversion

Bad1.4%

search→purchase rate — share of searches ending in a sale

Growth

Bad-25.4%

90-day search growth — must beat 0% to launch

Signals No Dominant Brand Low Review Barrier

According to Flapen's Amazon United Kingdom niche tracking, alien costume is a £103K/yr Amazon United Kingdom market (455K searches/yr). The top 5 brands hold 57% of demand. Demand peaks in Oct–Nov. Verdict: Worth a look — 51/100.

Data updated Jul 29, 2026 · scored weekly · How we score niches

alien costume market data

Units sold / yr: 8K–10K; avg 100–250/product
Revenue / yr: £127K–£159K; units × avg price
Conversion rate: 1.4%
Avg BSR: #1,711
Page quality: 0%
Prime: 67%
Sponsored: 73%
Out of stock: 16.8%
Avg brand age: 31 months
Avg seller age: 195 days

Competition & brand share

Clicks spread well past the top 5 (37% combined) — an open shelf where new products get seen.

Brands

32 falling

Sellers

Top-5 brand share

57%

Top 20: 90%

Top-5 click share

37%

Top 20: 74%

Open market

38%

AYBUY16%
Morph14%
RANSUU13%
SHMIZZ7%
Carreuty7%
Alaxciax5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -25.4% search growth over the last 90 days.

Peak months: Oct, Nov · busiest ÷ quietest = 25.9×

Open Trend

Top alien costume search terms

alien costume166K/yr +1.1%1.0% conv.
alien costume kids87K/yr -65.9%1.1% conv.
alien costume women17K/yr +35.5%0.5% conv.
kids alien costume26K/yr -39.1%1.5% conv.
alien fancy dress7K/yr +72.6%0.7% conv.
alien costume adults16K/yr -45.9%1.2% conv.
alien outfit6K/yr +21.9%0.6% conv.
inflatable alien costume26K/yr -22.3%2.9% conv.
alien inflatable costume19K/yr -35.5%1.3% conv.
alien costume men6K/yr +35.5%0.4% conv.

All search terms

Top alien 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)5 products 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

RANSUU Onesie Costume Alien Onesie Jumpsuit Adult Pyjama Womens and Mens Animal Alien Sleepwear Christmas Carnival Halloween blue S

RANSUU£27.374.3★26 rev

Carreuty 3 Pcs Alien Costume Sets Alien Headband with Tutu Skite Gloves for Kids Ears Cute Costume Funny Headwear for Halloween Cosplay Parties & Photos

Carreuty£10.094.2★18 rev

AYBUY Alien Costume Alien Kidnapping Inflatable Costume T-Rex Blow up Fancy Dress for Adults Funny Ride-on Halloween Costumes for Halloween Cosplay Masquerade Party

AYBUY£19.474.4★150 rev

Alien Kidnapping Inflatable Costume Spooktacular Creations Adult Halloween Christmas Funny Cosplay Party Festival Mask Prom (L 160-190cm)

SHMIZZ£19.654.5★37 rev

Morph Inflatable Costume Alien Inflatable Alien Costume Adult Aliens Costumes Adults Blow Up Costumes for Adults

Morph£29.324.5★672 rev

Newest

by launch date

Zaldita Womens Metallic Shiny Space Alien Costumes Glitter Sequin Dance Leotard Astronaut Jumpsuit Clubwear Blue S

Zaldita£18.270 rev

2mo ago

Rswnyirn Girls Metallic Alien Costume Rhinestones Sleeveless Ruffle Crop Tops and Mini Skirt Headband Pace Themed Party Green 5-6 Years

Rswnyirn£10.550 rev

3mo ago

4Pcs Three-Eyed Alien Costume Set Alien Fancy Dress Kit with Three-Eyed Headband Matching Gloves Tutu Skirt Striped Socks Funny Aliens Accessories for Cosplay Party Dress Up Day Halloween

Dazzroi£9.112 rev

4mo ago

Galaxy Shirt Womens 3D Galaxy Print Tops Round Neck Glitter T-Shirts Funny Alien Tops Universe Star Space Carnival Costume Party Festive Blouses Starry Sky Outfit Fashion Casual T-Shirt navy k L

Generisch£5.750 rev

6mo ago

MUNSKT 6 PCS Alien Costume Accessories Alien Headband with Glasses Gloves Earrings Glasses Stickers Glitter Set Glitter for Halloween Women Cosplay Carnival Dress up

MUNSKT£7.451 rev

6mo ago

What buyers say about alien costume

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall15%

“Good quality”

Size-Overall14%

“Good fit”

Advertised Vs Actual Product12%

“Does the job”

Ease Of Use10%

“Simple to use”

Fun/Entertainment Experience8%

“Great fun”

Efficiency4%

“it works perfect”

Inflation/Deflation4%

“Great fun easy to inflate”

Stretchability/Expandability/Elasticity4%

“The elastic band of the skirt goes a long way”

Comfort-Overall4%

“Comfort is reasonable for short spells”

Value For Money4%

“good value for money”

What buyers complain about

Size-Overall18%

“Poor sizing of the skirt”

Thickness13%

“quite thin material”

Battery Inclusion10%

“Didnt come with batteries even though it said it did”

Durability8%

“Just goes down really fast”

Battery Life5%

“The batteries run out quite quickly”

Material Quality5%

“Material does feel a bit thin”

Inflation/Deflation5%

“Wish it had stayed inflated for a bit longer”

Functionality-Overall5%

“Works but not for long”

Quality-Overall3%

“Cheap”

Stitch/Finish/Polish3%

“Unfortunately one of the gloves has a hole where it hasn't been stitched properly”

Top return reasons

Size-Overall68%

Quality-Overall6%

Inflation/Deflation4%

Advertised Vs Actual Product3%

Comfort-Overall2%

Value For Money2%

Functionality-Overall2%

Defective Material/Parts2%

Durability2%

Color2%

Common questions

Is alien costume profitable to sell on Amazon United Kingdom?: The niche generates £103K/yr across 48 tracked products. 0 of 18 products launched in the last 360 days are still selling. 90-day search growth is -25.4%. Flapen's verdict: Worth a look (51/100).
How competitive is the alien costume niche?: 32 brands and 51 sellers compete. The top 5 products take 37% of clicks and top 5 brands hold 57% of demand.
What do buyers complain about in alien costume?: Top complaints mined from reviews: Size-Overall, Thickness, Battery Inclusion. The return rate is 4.0%.
When does demand for alien costume peak?: Demand peaks in Oct–Nov; the busiest month runs 25.9× the quietest.
What does it cost to enter the alien costume niche?: Listings span £5.75–£34.85; the average listing price is £15.89 (sweet spot $15–$100). The average incumbent carries 148 reviews — the moat a new listing must climb.