Is master splinter costume profitable to sell on Amazon United States?

The niche generates $13K/yr across 32 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -4.0%. Flapen's verdict: Skip it (43/100).

How competitive is the master splinter costume niche?

26 brands and 41 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 60% of demand.

What do buyers complain about in master splinter costume?

Top complaints mined from reviews: Quality-Overall, Adhesion/Stickiness, Size-Overall. The return rate is 9.0% — above our launch gate.

When does demand for master splinter costume peak?

Demand peaks in Sep–Oct–Nov; the busiest month runs 65.2× the quietest.

What does it cost to enter the master splinter costume niche?

Listings span $6.18–$89.44; the average listing price is $22.33 (sweet spot $15–$100). The average incumbent carries 951 reviews — the moat a new listing must climb.

Master Splinter Costume

Skip it

A small market ($13K/yr) — this niche doesn't clear our bar today.

Avg price

Great$22.33

avg listing price — sweet spot $15–$100

Price range

Great$6.18–$89.44

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

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Brand share

Great60%

top-5 brand share — no brand owns this niche

Review moat

Good950.97

avg incumbent reviews — the moat a new listing must climb

Competition

Good47%

top-5 click share — leaders hold, buyers still browse

Growth

Bad-4.0%

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

Conversion

Bad0.9%

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

Returns

Bad9.0%

return rate — above 5% kills the launch gate

Market size

Bad$13K

$13K/yr · 62K searches

Signals High Returns

Is master splinter costume profitable on Amazon?

According to Flapen's Amazon United States niche tracking, master splinter costume is a $13K/yr Amazon United States market (62K searches/yr). The top 5 brands hold 60% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 43/100.

Data updated Jul 17, 2026 · scored weekly · How we score niches

master splinter costume market size & sales

Units sold, revenue, conversion and listing quality across the tracked shelf.

Units sold / yr: 1K–2K; avg 0–100/product
Revenue / yr: $28K–$33K; units × avg price
Conversion rate: 0.9%
Avg BSR: #44,143
Page quality: 0%
Prime: 88%
Sponsored: 63%
Out of stock: 8.0%
Avg brand age: 59 months
Avg seller age: 214 days

Competition: brands, sellers & click share

The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.

Brands

26 rising

Sellers

Top-5 brand share

60%

Top 20: 95%

Top-5 click share

47%

Top 20: 87%

Open market

36%

WonShak23%
GOLDSTITCH12%
Fun Costumes9%
HENGYUTOYMASK8%
Mustaches7%
California Costumes5%

master splinter costume demand & seasonality

Weekly Amazon search volume, last 104 weeks — -4.0% search growth over the last 90 days.

Peak months: Sep, Oct, Nov · busiest ÷ quietest = 65.2×

Open Trend

Top master splinter costume search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

master splinter costume32K/yr -1.7%1.7% conv.
splinter costume14K/yr +4.8%1.3% conv.
splinter costume adult6K/yr -25.1%4.3% conv.
master splinter costume adult9K/yr -52.9%1.8% conv.

All search terms

Top master splinter costume products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

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★)2 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

WonShak Wizard Tunic Hooded Robe Monk Priest Cloak Halloween Costume Knight Hood Cape Men Renaissance Robe Burgundy Small

WonShak$14.014.2★174 rev

GOLDSTITCH Men Hooded Robe Cloak Knight Fancy Cool Cosplay Costume

GOLDSTITCH$17.034.4★16,994 rev

Adult New Mutant Rat Head Animal Costume Face Splinter Halloween Mouse Mask Brown

HENGYUTOYMASK$21.344.4★132 rev

Mustaches Self Adhesive Fake Mustache and Beard Novelty Shaolin False Facial Hair Costume Accessory for Adults White Color

Mustaches$13.064.2★138 rev

WonShak Tunic Hooded Robe Monk Priest Black Cloak Halloween Costume Knight Hood Cape Men Renaissance Wizard Robe Small

WonShak$10.914.2★174 rev

Newest

by launch date

Teenage Mutant Ninja Turtles Master Splinter Adult Halloween Costume with Robe Pants Gloves Headpiece Medium

Fun Costumes$89.440 rev

2mo ago

Teenage Mutant Ninja Turtles Master Splinter Adult Halloween Costume with Robe Pants Gloves Headpiece Large

Fun Costumes$87.680 rev

2mo ago

Halloween Costume Set with Brown Textured Vest Green Character Ears Headband Nose Piece Adult Size (Brown Green 2XL)

SUPWISER$20.8424 rev

11mo ago

EMORBALS Fake Mustache and Goatee Stick On Fake Goatee Costume Facial Hair for Adults Kids-White-Suitable for Children Over 3 Years Old

EMORBALS$7.5126 rev

1y ago

Dajiahao Men Cosplay Cloak Robe Costume Adult Halloween Costume Tunic Hoodies Robe Cosplay Capes(brown-L)

Dajiahao$16.5637 rev

1y ago

What reviews say buyers love and hate about master splinter costume

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

What buyers love

Value For Money18%

“was a good price”

Quality-Overall15%

“Good accessories”

Comfort-Overall10%

“comfortable to wear”

Fun/Entertainment Experience10%

“Fun”

Material Quality10%

“Great material it was PERFECT”

Smell10%

“It looks and smells exactly how you want it to”

Size-Overall5%

“arrived timely and fit nicely”

Stitch/Finish/Polish3%

“Stitching is in place with no issues of coming apart”

Durability3%

“it definitely would hold up well for more frequent wear”

What buyers complain about

Quality-Overall19%

“Cheap looking”

Adhesion/Stickiness13%

“Doesn't stick”

Size-Overall13%

“Smaller”

Print Quality13%

“Print stick onto itself and peeled up”

Allergies6%

“I am allergic to latex”

Smell6%

“I will admit that it does have a chemical plastic smell even after a couple days”

Value For Money3%

“A bit expensive for the quality”

Top return reasons

Size-Overall40%

Length17%

Material Quality6%

Color6%

Advertised Vs Actual Product4%

Quality-Overall4%

Strength2%

Sleeve Fit2%

Adhesion/Stickiness2%

Value For Money2%

Common master splinter costume questions

Is master splinter costume profitable to sell on Amazon United States?: The niche generates $13K/yr across 32 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -4.0%. Flapen's verdict: Skip it (43/100).
How competitive is the master splinter costume niche?: 26 brands and 41 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 60% of demand.
What do buyers complain about in master splinter costume?: Top complaints mined from reviews: Quality-Overall, Adhesion/Stickiness, Size-Overall. The return rate is 9.0% — above our launch gate.
When does demand for master splinter costume peak?: Demand peaks in Sep–Oct–Nov; the busiest month runs 65.2× the quietest.
What does it cost to enter the master splinter costume niche?: Listings span $6.18–$89.44; the average listing price is $22.33 (sweet spot $15–$100). The average incumbent carries 951 reviews — the moat a new listing must climb.