Is cookie monster costume profitable to sell on Amazon United States?

The niche generates $121K/yr across 29 tracked products. 1 of 7 products launched in the last 360 days are still selling. 90-day search growth is -19.5%. Flapen's verdict: Skip it (37/100).

How competitive is the cookie monster costume niche?

12 brands and 26 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 74% of demand.

What do buyers complain about in cookie monster costume?

Top complaints mined from reviews: Size-Overall. The return rate is 12.6% — above our launch gate.

When does demand for cookie monster costume peak?

Demand peaks in Sep–Oct–Nov; the busiest month runs 78.5× the quietest.

What does it cost to enter the cookie monster costume niche?

Listings span $9.30–$109.88; the average listing price is $46.98 (sweet spot $15–$100). The average incumbent carries 508 reviews — the moat a new listing must climb.

cookie monster costume

Skip it

High returns (12.6%) — this niche doesn't clear our bar today.

Avg price

Great$46.98

avg listing price — sweet spot $15–$100

Price range

Great$9.30–$109.88

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

Review moat

Good508.48

avg incumbent reviews — the moat a new listing must climb

Competition

Good49%

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

Brand share

Good74%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Market size

Okay$121K

$121K/yr · 1.0M searches

Growth

Bad-19.5%

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

Conversion

Bad0.3%

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

Returns

Bad12.6%

return rate — above 5% kills the launch gate

Signals High Returns

According to Flapen's Amazon United States niche tracking, cookie monster costume is a $121K/yr Amazon United States market (1.0M searches/yr). The top 5 brands hold 74% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Skip it — 37/100.

Data updated Jul 21, 2026 · scored weekly · How we score niches

cookie monster costume market data

Units sold / yr: 6K–8K; avg 0–100/product
Revenue / yr: $282K–$376K; units × avg price
Conversion rate: 0.3%
Avg BSR: #58,305
Page quality: 0%
Prime: 72%
Sponsored: 79%
Out of stock: 24.1%
Avg brand age: 37 months
Avg seller age: 187 days

Competition & brand share

The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 falling

Sellers

Top-5 brand share

74%

Top 20: 100%

Top-5 click share

49%

Top 20: 88%

Open market

20%

INTIMO39%
Bioworld12%
Wjkvgnsdm8%
Popfunk8%
Fun Costumes7%
MJC6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -19.5% search growth over the last 90 days.

Peak months: Sep, Oct, Nov · busiest ÷ quietest = 78.5×

Open Trend

Top cookie monster costume search terms

cookie monster costume500K/yr -10.9%0.3% conv.
cookie monster onesie172K/yr -23.9%0.1% conv.
cookie monster costume adult123K/yr -30.1%0.4% conv.
cookie monster onesie adult29K/yr -17.5%0.3% conv.
cookie monster halloween costume13K/yr +75.2%0.0% conv.
cookie monster adult7K/yr -4.8%0.3% conv.
cookie monster costume kids30K/yr -35.5%0.1% conv.
cookie monster adult costume12K/yr -26.2%0.9% conv.
adult cookie monster costume21K/yr -16.1%0.4% conv.
cookie monster onsie9K/yr -4.1%0.0% conv.

All search terms

Top cookie monster 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

Sesame Street Character Adult Union Suit Kigurumi Hooded 1 Piece Pajama Men Women (Cookie Monster 2X-Large/3X-Large)

INTIMO$49.804.4★216 rev

Popfunk Sesame Street Cookie Monster T Shirt (Large)

Popfunk$16.384.7★1,251 rev

Wjkvgnsdm Animal Onesie Funny One-Piece Costume Unisex Cosplay Halloween Christmas Pajamas For Women Men Teen Blue m

Wjkvgnsdm$31.694.7★5 rev

Sesame Street Character Adult Union Suit Kigurumi Hooded 1 Piece Pajama Men Women (Cookie Monster Small/Medium)

INTIMO$50.784.4★216 rev

Opposuits Adult Unisex Cookie Monster Onesie - Sesame Street One-piece Pajamas - Loose Fit - Including Pockets - Blue

Opposuits$51.534.2★48 rev

Newest

by launch date

Sesame Street Cookie Monster Fleece Zip Up Jumpsuit Adult Halloween Costume Cosplay One Piece Union Suit Officially Licensed (Medium) Red

MJC$57.9827 rev

9mo ago

Sesame Street Cookie Monster Fleece Zip Up Jumpsuit Adult Halloween Costume Cosplay One Piece Union Suit Officially Licensed (Small) Red

MJC$58.1527 rev

9mo ago

Wjkvgnsdm Animal Onesie Funny One-Piece Costume Unisex Cosplay Halloween Christmas Pajamas For Women Men Teen Blue m

Wjkvgnsdm$31.695 rev

10mo ago

Wjkvgnsdm Animal Onesie Funny One-Piece Costume Unisex Cosplay Halloween Christmas Pajamas For Teen Women Men Blue L

Wjkvgnsdm$29.545 rev

10mo ago

Sesame Street Union Suit Toddler Kids Hooded One Piece Fleece Pajama For Boys and Girls (Cookie Monster 2T)

INTIMO$29.20174 rev

2y ago

What buyers say about cookie monster costume

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

What buyers love

Warmth19%

“Perfect for winter super warm and cozy”

Value For Money16%

“great costume for the money”

Quality-Overall12%

“Quality appears good”

Size-Overall12%

“Great fit, easy to don and doff”

Material Quality10%

“Fabric is amazing great for cold weather”

Soft Feel8%

“other wise it soft and very cute”

Zipper Quality4%

“The zipper worked well”

Thickness4%

“Well made, thick enough/thin enough for fall/ thin enough for spring”

Advertised Vs Actual Product4%

“True to picture shown”

Weather Proof3%

“Fabric is amazing great for cold weather”

What buyers complain about

Size-Overall50%

“This Cookie Monster costumes awesome the appearance is very recognizable as Cookie Monster the size was a bit small of what it said it was”

Top return reasons

Size-Overall62%

Length11%

Color3%

Material Quality3%

Thigh Fit2%

Advertised Vs Actual Product2%

Functionality-Overall2%

Quality-Overall2%

Shoulder Fit1%

Sleeve Fit1%

Common questions

Is cookie monster costume profitable to sell on Amazon United States?: The niche generates $121K/yr across 29 tracked products. 1 of 7 products launched in the last 360 days are still selling. 90-day search growth is -19.5%. Flapen's verdict: Skip it (37/100).
How competitive is the cookie monster costume niche?: 12 brands and 26 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 74% of demand.
What do buyers complain about in cookie monster costume?: Top complaints mined from reviews: Size-Overall. The return rate is 12.6% — above our launch gate.
When does demand for cookie monster costume peak?: Demand peaks in Sep–Oct–Nov; the busiest month runs 78.5× the quietest.
What does it cost to enter the cookie monster costume niche?: Listings span $9.30–$109.88; the average listing price is $46.98 (sweet spot $15–$100). The average incumbent carries 508 reviews — the moat a new listing must climb.