Is ninja costume profitable to sell on Amazon United Kingdom?

The niche generates £49K/yr across 47 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -79.4%. Flapen's verdict: Skip it (44/100).

How competitive is the ninja costume niche?

16 brands and 33 sellers compete. The top 5 products take 36% of clicks and top 5 brands hold 70% of demand.

What do buyers complain about in ninja costume?

Top complaints mined from reviews: Size-Overall, Quality-Overall, Advertised Vs Actual Product. The return rate is 2.9%.

When does demand for ninja costume peak?

Demand peaks in Mar–Oct–Nov; the busiest month runs 17.9× the quietest.

What does it cost to enter the ninja costume niche?

Listings span £6.00–£33.34; the average listing price is £17.78 (sweet spot $15–$100). The average incumbent carries 1,097 reviews — the moat a new listing must climb.

ninja costume

Skip it

Soft demand (-79.4% this quarter) — this niche doesn't clear our bar today.

Avg price

Great£17.78

avg listing price — sweet spot $15–$100

Competition

Great36%

top-5 click share — an open shelf

Price range

Good£6.00–£33.34

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Review moat

Good1,096.89

avg incumbent reviews — the moat a new listing must climb

Brand share

Good70%

top-5 brand share — brands hold most of the demand

Returns

Good2.9%

return rate — above 5% kills the launch gate

Conversion

Bad1.7%

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

Market size

Bad£49K

£49K/yr · 159K searches

Growth

Bad-79.4%

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

According to Flapen's Amazon United Kingdom niche tracking, ninja costume is a £49K/yr Amazon United Kingdom market (159K searches/yr). The top 5 brands hold 70% of demand. Demand peaks in Mar–Oct–Nov. Verdict: Skip it — 44/100.

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

ninja costume market data

Units sold / yr: 3K–3K; avg 0–100/product
Revenue / yr: £44K–£53K; units × avg price
Conversion rate: 1.7%
Avg BSR: #1,024
Page quality: 0%
Prime: 83%
Sponsored: 83%
Out of stock: 7.0%
Avg brand age: 51 months
Avg seller age: 192 days

Competition & brand share

Clicks spread well past the top 5 (36% combined) — an open shelf where new products get seen.

Brands

16 rising

Sellers

Top-5 brand share

70%

Top 20: 100%

Top-5 click share

36%

Top 20: 79%

Open market

25%

Spooktacular Creations26%
Banxidi15%
SATKULL12%
Aomig10%
Morph8%
BSBUY5%

Demand & seasonality

Weekly Amazon search volume, last 92 weeks — -79.4% search growth over the last 90 days.

Peak months: Mar, Oct, Nov · busiest ÷ quietest = 17.9×

Open Trend

Top ninja costume search terms

ninja costume kids66K/yr -82.5%1.8% conv.
ninja costume39K/yr -72.5%0.8% conv.
kids ninja costume22K/yr -78.1%2.6% conv.
ninja outfit7K/yr -63.4%1.2% conv.
ninja outfit kids6K/yr -72.8%3.1% conv.
ninja kids costume7K/yr -89.7%0.6% conv.
boys ninja costume7K/yr -91.2%0.4% conv.
ninja halloween costumes for boys4K/yr -95.8%0.0% conv.

All search terms

Top ninja 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★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Aomig Kids Halloween Fancy Dress Costume with Ninja Accessories Warrior Muscle Costume for Boys Girls Luxury Role Play Outfit for Halloween Cosplay Theme Party (M)

Aomig£11.514.6★1,008 rev

Spooktacular Creations Halloween Golden Ninja fighter costume for kids Toddlers Boys (Medium (8-10 yrs))

Spooktacular Creations£24.434.5★1,345 rev

Spooktacular Creations Boys Ninja Deluxe Costume for Kids Halloween Ninja Cosplay Costume for Boys and Girls

Spooktacular Creations£16.364.6★10,073 rev

SATKULL Kids Ninja Costumes Halloween Ninja Costume Set for Boy Deluxe Ninjas Role Playing Suit(Kids-S-4/5T Black)

SATKULL£15.164.5★380 rev

Banxidi Ninja Kidz Boys Tracksuit Hoodies Kids Sweatshirt Long Sleeve for 2-piece Sets Sportswear Clothing 2-13Years black-150CM

Banxidi£21.494.2★70 rev

Newest

by launch date

BSBUY Ninja Costume Kids Halloween Ninja Fancy Dress Costume with Ninja Accessories Warrior Ninja Muscle Costume for Boys Girls Luxury Ninja Role Play outfit for Halloween Cosplay Theme Party(M)

BSBUY£11.674 rev

3mo ago

BSBUY Ninja Costume Kids Halloween Ninja Fancy Dress Costume with Ninja Accessories Warrior Ninja Muscle Costume for Boys Girls Luxury Ninja Role Play outfit for Halloween Cosplay Theme Party(L)

BSBUY£11.1722 rev

8mo ago

GRACEART Mens Black Ninja Costume Japanese Samurai Swordsman Uniform Suit Halloween Cosplay Outfit

GRACEART£33.3416 rev

1y ago

Banxidi Ninja Kidz Boys Tracksuit Hoodies Kids Sweatshirt Long Sleeve for 2-piece Sets Sportswear Clothing 2-13Years black-150CM

Banxidi£21.4970 rev

2y ago

Banxidi Ninja Kidz Boys Tracksuit Hoodies Black 130CM

Banxidi£22.1870 rev

2y ago

What buyers say about ninja costume

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

What buyers love

Size-Overall25%

“Great size”

Value For Money22%

“Value for money”

Quality-Overall19%

“Best Quality”

Advertised Vs Actual Product13%

“Product came as described”

Gifting Purpose7%

“Rccellent presentmade my grandson happy”

Durability2%

“and durable”

Material Quality2%

“All accessories are made of plastic, which is safe, non-toxic, and durable”

What buyers complain about

Size-Overall48%

“The size was too small as well”

Quality-Overall31%

“It not been made well”

Advertised Vs Actual Product5%

“not the red advertised”

Durability3%

“The eye hole has frayed significantly”

Strength3%

“sadly this ninja suit is not made of strong stuff”

Stitch/Finish/Polish3%

“the costume started to come undone at the seam at the back below the zip”

Top return reasons

Size-Overall80%

Quality-Overall9%

Material Quality3%

Stitch/Finish/Polish2%

Durability1%

Functionality-Overall1%

Touch/Button Controls1%

Product Condition1%

Advertised Vs Actual Product1%

Strap/String Quality1%

Common questions

Is ninja costume profitable to sell on Amazon United Kingdom?: The niche generates £49K/yr across 47 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -79.4%. Flapen's verdict: Skip it (44/100).
How competitive is the ninja costume niche?: 16 brands and 33 sellers compete. The top 5 products take 36% of clicks and top 5 brands hold 70% of demand.
What do buyers complain about in ninja costume?: Top complaints mined from reviews: Size-Overall, Quality-Overall, Advertised Vs Actual Product. The return rate is 2.9%.
When does demand for ninja costume peak?: Demand peaks in Mar–Oct–Nov; the busiest month runs 17.9× the quietest.
What does it cost to enter the ninja costume niche?: Listings span £6.00–£33.34; the average listing price is £17.78 (sweet spot $15–$100). The average incumbent carries 1,097 reviews — the moat a new listing must climb.