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grinch party supplies

Skip it

Weak search conversion (1.9%) — this niche doesn't clear our bar today.

Market size 25Growth 36Conversion 24Competition 54Returns 44Price range 38Avg price 56Brand share 76Review moat 82Quality gap 28

Review moat

Great364

avg incumbent reviews — the moat a new listing must climb

Brand share

Great59%

top-5 brand share — no brand owns this niche

Avg price

Good$12.67

avg listing price — sweet spot $15–$100

Competition

Good53%

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

Returns

Okay3.5%

return rate — above 5% kills the launch gate

Price range

Okay$2.48–$22.76

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

Growth

Okay+8.9%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Market size

Bad$98K

$98K/yr · 413K searches

Conversion

Bad1.9%

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

According to Flapen's Amazon United States niche tracking, grinch party supplies is a $98K/yr Amazon United States market (413K searches/yr). The top 5 brands hold 59% of demand. Demand peaks in Nov–Dec. Verdict: Skip it — 43/100.

Data updated Jul 23, 2026 · scored weekly · How we score niches

grinch party supplies market data

Units sold / yr
10K–13K
avg 100–250/product
Revenue / yr
$127K–$158K
units × avg price
Conversion rate
1.9%
Avg BSR
#3,384
Page quality
0%
Prime
90%
Sponsored
52%
Out of stock
23.9%
Avg brand age
30 months
Avg seller age
171 days

Competition & brand share

The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.

Brands

18 falling

Sellers

33

Top-5 brand share

59%

Top 20: 100%

Top-5 click share

53%

Top 20: 99%

Open market

36%

  • UNJUICE28%
  • The Grinch9%
  • Generic9%
  • Anagram7%
  • kingmagnate7%
  • TC.ES5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +8.9% search growth over the last 90 days.
120K80KSpike '24Black Friday '24Holiday '24Prime Day '25Spike '25Black Friday '25Holiday '25Spike '26Prime Day '26SepDecMarJunAugNovMarMay

Peak months: Nov, Dec · busiest ÷ quietest = 46.1×

Top grinch party supplies search terms

  • grinch birthday party decorations116K/yr
  • grinch birthday29K/yr
  • grinch birthday decorations51K/yr
  • grinch party supplies77K/yr
  • the grinch birthday party supplies11K/yr
  • twoville grinch birthday decor7K/yr
  • grinch birthday party10K/yr
  • grinch christmas decorations party25K/yr
  • grinch christmas party supplies12K/yr
  • grinch birthday decor6K/yr
All search terms

Top grinch party supplies 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.

0%10%$10K20%$20K30%$30K40%$39K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 21 tracked products in this niche — three views at once, no toggling.

What buyers say about grinch party supplies

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

What buyers love

Quality-Overall22%

“lots of variety”

Size-Overall14%

“Good size”

Color13%

“Love the color”

Durability10%

“Pretty durable”

Advertised Vs Actual Product7%

“As expected”

Value For Money5%

“Worth it”

Adhesion/Stickiness5%

“The adhesive strip stuck well over the door frame for the duration of the event”

Assembly/Installation4%

“Easy installation”

Portability3%

“GreatMy grandson carry it everywhere”

Strength3%

“Strong and sturdy”

What buyers complain about

Quality-Overall17%

“Product was cheap”

Value For Money13%

“Youll get it cheaper”

Hard Feel8%

“Napkins were a bit stiff”

Size-Overall8%

“Bigger than I knew”

Moist/Dry8%

“but very dry foam textured”

Product Condition8%

“Product was used”

Weather Proof8%

“Not Weatherproof unfortunately”

Ease Of Use8%

“It was kind of difficult to blow up”

Strength4%

“Very thin and flimsy”

Smell2%

“There was a slight plastic-y smell when I opened the package”

Top return reasons

Size-Overall25%
Advertised Vs Actual Product21%
Value For Money11%
Material Quality7%
Color5%
Quality-Overall5%
Defective Material/Parts5%
Product Condition3%
Functionality-Overall2%
Thin2%

Common questions

Is grinch party supplies profitable to sell on Amazon United States?
The niche generates $98K/yr across 21 tracked products. 2 of 7 products launched in the last 360 days are still selling. 90-day search growth is +8.9%. Flapen's verdict: Skip it (43/100).
How competitive is the grinch party supplies niche?
18 brands and 33 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 59% of demand.
What do buyers complain about in grinch party supplies?
Top complaints mined from reviews: Quality-Overall, Value For Money, Hard Feel. The return rate is 3.5%.
When does demand for grinch party supplies peak?
Demand peaks in Nov–Dec; the busiest month runs 46.1× the quietest.
What does it cost to enter the grinch party supplies niche?
Listings span $2.48–$22.76; the average listing price is $12.67 (sweet spot $15–$100). The average incumbent carries 364 reviews — the moat a new listing must climb.