Is ninjago birthday party supplies profitable to sell on Amazon United States?

The niche generates $107K/yr across 32 tracked products. 4 of 17 products launched in the last 360 days are still selling. 90-day search growth is +6.9%. Flapen's verdict: Worth a look (56/100).

How competitive is the ninjago birthday party supplies niche?

21 brands and 23 sellers compete. The top 5 products take 43% of clicks and top 5 brands hold 59% of demand.

What do buyers complain about in ninjago birthday party supplies?

Top complaints mined from reviews: Size-Overall, Inflation/Deflation, Thickness. The return rate is 2.5%.

When does demand for ninjago birthday party supplies peak?

Demand is steady year-round — the busiest month runs 2.2× the quietest.

What does it cost to enter the ninjago birthday party supplies niche?

Listings span $8.41–$35.33; the average listing price is $17.22 (sweet spot $15–$100). The average incumbent carries 37 reviews — the moat a new listing must climb.

ninjago birthday party supplies

Worth a look

Shows a thin review moat (37 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Review moat

Incredible36.69

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$17.22

avg listing price — sweet spot $15–$100

Brand share

Great59%

top-5 brand share — no brand owns this niche

Price range

Great$8.41–$35.33

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

Competition

Good43%

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

Returns

Good2.5%

return rate — above 5% kills the launch gate

Conversion

Good4.1%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Okay+6.9%

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

Market size

Okay$107K

$107K/yr · 151K searches

Signals No Dominant Brand Low Review Barrier

According to Flapen's Amazon United States niche tracking, ninjago birthday party supplies is a $107K/yr Amazon United States market (151K searches/yr). The top 5 brands hold 59% of demand. Verdict: Worth a look — 56/100.

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

ninjago birthday party supplies market data

Units sold / yr: 6K–8K; avg 100–250/product
Revenue / yr: $103K–$138K; units × avg price
Conversion rate: 4.1%
Avg BSR: #2,747
Page quality: 0%
Prime: 97%
Sponsored: 56%
Out of stock: 10.0%
Avg brand age: 32 months
Avg seller age: 176 days

Competition & brand share

The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them.

Brands

21 falling

Sellers

Top-5 brand share

59%

Top 20: 99%

Top-5 click share

43%

Top 20: 88%

Open market

35%

Shifigril19%
ELZEM17%
ShrooFit9%
karg8%
FFGJA6%
PINUO5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +6.9% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 2.2×

Open Trend

Top ninjago birthday party supplies search terms

ninjago birthday decorations62K/yr +12.9%3.6% conv.
lego ninjago birthday decorations17K/yr +12.4%2.2% conv.
ninjago birthday15K/yr +10.1%2.4% conv.
ninjago party decorations16K/yr -10.0%4.1% conv.
ninjago birthday party supplies9K/yr -13.7%2.1% conv.
ninjago party8K/yr -4.4%2.5% conv.
ninjago balloons6K/yr +18.3%4.3% conv.
lego ninjago party decorations6K/yr +12.0%3.0% conv.
ninjago party supplies7K/yr +4.3%3.3% conv.
ninjago decorations5K/yr +3.3%3.1% conv.

All search terms

Top ninjago birthday 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)4 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

Party Decorations Ninja Birthday Party Supplies Includes Banner- Cake Topper - Cupcake Toppers - Balloons

ELZEM$23.774.4★6 rev

27pcs Ninja Party Decoration Pack IncludesBannerCake TopperBlackdrop for Ninja party supplies

Shifigril$24.323.8★16 rev

Ninja Party Decorations Birthday Party Supplies For Cartoon Ninja Hero Party Supplies Includes Banner - Cake Topper - 24 Cupcake Toppers - 18 Balloons

karg$16.724.8★15 rev

ShrooFit Ninja-go Party Supplies 40pck include 20 plates 20 napkins for the birthday Ninja party decoration

ShrooFit$15.304.2★73 rev

40PCS Ninja-go Party Supplies Set Birthday Decorations Tableware Kit With 20 7Plates 20 Napkins for Ninja Party Decoration

Kangzilang$14.203.9★6 rev

Newest

by launch date

25pcs For Ninja Cartoon Birthday Decorations with 24pcs Cupcake Toppers 1pcs Cake Topper for Birthday Party Supplies.

FFGJA$11.525 rev

3mo ago

8Pcs For Ninja Honeycomb Table Centerpiece Birthday Party Supplies Table Decorations for Kids Party Decorations.

FFGJA$17.880 rev

3mo ago

FFGJA 12pcs For Ninja Cartoon Party Gift Bags with Handles Cartoon Birthday Party Supplies for Party Decorations.

FFGJA$13.800 rev

3mo ago

Ninja Hero Birthday Party Decorations Cartoon Hero Party Supply Set for Kids with Happy Birthday Banner Swirls Centerpieces 18 Balloons for Ninja Hero Party Decorations

Ezcpigei$15.194 rev

5mo ago

40PCS Ninja-go Party Supplies Set Birthday Decorations Tableware Kit With 20 7Plates 20 Napkins for Ninja Party Decoration

Kangzilang$14.206 rev

6mo ago

What buyers say about ninjago birthday party supplies

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

What buyers love

Quality-Overall25%

“Good quality”

Advertised Vs Actual Product20%

“Just what we wanted”

Color9%

“Great colors”

Fun/Entertainment Experience8%

“Sturdy and lots of fun”

Size-Overall5%

“Great size and quality”

Material Quality4%

“The backdrop material is ok”

Value For Money4%

“Good bang for your buck”

Correct Contents3%

“Perfect 120pcs of Cartoon Ninja Stickers Pack plus an extra 4pcs”

Baking3%

“Perfect cake plate”

Ease Of Use3%

“easy to blow up”

What buyers complain about

Size-Overall27%

“A little small”

Inflation/Deflation13%

“Deflates”

Thickness8%

“Its not super long or thick”

Strength6%

“Not very sturdy”

Value For Money6%

“With the very high price”

Paint Quality6%

“A couple of the paints were a bit dried out”

Smell5%

“The smell went away with a little fresh air”

Adhesion/Stickiness2%

“The tape it includes isnt too good”

Top return reasons

Size-Overall42%

Value For Money11%

Advertised Vs Actual Product8%

Quality-Overall5%

Defective Material/Parts4%

Color4%

Image/Picture Clarity3%

Assembly/Installation3%

Inflation/Deflation3%

Material Quality3%

Common questions

Is ninjago birthday party supplies profitable to sell on Amazon United States?: The niche generates $107K/yr across 32 tracked products. 4 of 17 products launched in the last 360 days are still selling. 90-day search growth is +6.9%. Flapen's verdict: Worth a look (56/100).
How competitive is the ninjago birthday party supplies niche?: 21 brands and 23 sellers compete. The top 5 products take 43% of clicks and top 5 brands hold 59% of demand.
What do buyers complain about in ninjago birthday party supplies?: Top complaints mined from reviews: Size-Overall, Inflation/Deflation, Thickness. The return rate is 2.5%.
When does demand for ninjago birthday party supplies peak?: Demand is steady year-round — the busiest month runs 2.2× the quietest.
What does it cost to enter the ninjago birthday party supplies niche?: Listings span $8.41–$35.33; the average listing price is $17.22 (sweet spot $15–$100). The average incumbent carries 37 reviews — the moat a new listing must climb.

ninjago birthday party supplies

ninjago birthday party supplies market data

Competition & brand share

Demand & seasonality

Top ninjago birthday party supplies search terms

Top ninjago birthday party supplies products on Amazon

Top sellers

Newest

Trending

What buyers say about ninjago birthday party supplies

What buyers love

What buyers complain about

Top return reasons

Common questions

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