Is one piece birthday decorations profitable to sell on Amazon United States?

The niche generates $380K/yr across 28 tracked products. 9 of 19 products launched in the last 360 days are still selling. 90-day search growth is +32.3%. Flapen's verdict: Worth a look (57/100).

How competitive is the one piece birthday decorations niche?

15 brands and 19 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 79% of demand.

What do buyers complain about in one piece birthday decorations?

Top complaints mined from reviews: Size-Overall, Quality-Overall, Advertised Vs Actual Product. The return rate is 0.9%.

When does demand for one piece birthday decorations peak?

Demand peaks in May–Jul–Aug; the busiest month runs 2.5× the quietest.

What does it cost to enter the one piece birthday decorations niche?

Listings span $7.49–$28.39; the average listing price is $17.62 (sweet spot $15–$100). The average incumbent carries 315 reviews — the moat a new listing must climb.

one piece birthday decorations

Worth a look

Shows low returns (0.9%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.9%

return rate — above 5% kills the launch gate

Review moat

Great315.18

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$17.62

avg listing price — sweet spot $15–$100

Price range

Good$7.49–$28.39

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

Growth

Good+32.3%

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

Market size

Good$380K

$380K/yr · 599K searches

Competition

Good52%

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

Conversion

Okay3.6%

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

Brand share

Okay79%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Signals Low Review Barrier Out of Stock

According to Flapen's Amazon United States niche tracking, one piece birthday decorations is a $380K/yr Amazon United States market (599K searches/yr). The top 5 brands hold 79% of demand. Demand peaks in May–Jul–Aug. Verdict: Worth a look — 57/100.

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

one piece birthday decorations market data

Units sold / yr: 15K–20K; avg 250–500/product
Revenue / yr: $264K–$352K; units × avg price
Conversion rate: 3.6%
Avg BSR: #1,921
Page quality: 0%
Prime: 100%
Sponsored: 86%
Out of stock: 20.6%
Avg brand age: 27 months
Avg seller age: 155 days

Competition & brand share

The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 falling

Sellers

Top-5 brand share

79%

Top 20: 100%

Top-5 click share

52%

Top 20: 92%

Open market

16%

MLEDUY27%
KROCEUS25%
FFGJA13%
Signreen9%
TYZZHOA6%
Get Trend5%
Open — no brand owns it (9 brands, 16%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +32.3% search growth over the last 90 days.

Peak months: May, Jul, Aug · busiest ÷ quietest = 2.5×

Open Trend

Top one piece birthday decorations search terms

one piece birthday decorations240K/yr +30.6%2.0% conv.
one piece party decorations81K/yr +41.4%1.7% conv.
one piece birthday48K/yr +22.0%1.2% conv.
one piece decorations40K/yr +35.1%1.3% conv.
one piece party favors23K/yr +52.6%0.9% conv.
one piece anime birthday decorations32K/yr +23.5%1.3% conv.
one piece balloons17K/yr +56.2%0.9% conv.
one piece decorations birthday19K/yr +27.0%1.6% conv.
one piece party16K/yr +25.7%1.2% conv.
one piece party supplies11K/yr +29.6%1.3% conv.

All search terms

Top one piece birthday decorations 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

Adeventure Themed Birthday Party Decorations Set - Including Banner Foil Balloons Printed Balloons Tablecloth for Themed Party

MLEDUY$23.204.8★54 rev

112PCS One Piece Birthday Party Supplies - 1 Banner 20 9 - inch Plates 20 7 - inch Plates 20 Cups 1 Tablecloth 20 Napkins 30 Spoons + Forks + Knives

KROCEUS$28.394.2★41 rev

98 PCS Birthday Party Supplies Party Decorations Include Theme Stickers Happy Birthday Banner Hanging Swirls Tablecloth Latex Balloons for Adult

Signreen$14.384.5★14 rev

H Cartoon For Party Supplies Birthday Decorations Set Include Banner Balloons Hanging Swirls Cake Cupcake Toppers for Boys Girls Party.

FFGJA$21.634.3★11 rev

Adeventure Themed Birthday Party Decorations Set - Cartoon Theme Party Supplies (Includes Banner Foil Balloons Printed Balloons Tablecloth Tableware Napkins)

MLEDUY$27.614.9★42 rev

Newest

by launch date

41PCS One Piece Party Tableware 20 Plates and 20 Napkins and Tablecloth 71 x 42 Drl Birthday Party Decor Supplies

KROCEUS$18.6410 rev

1mo ago

For One Piece Happy Birthday Banner Party Decoration With 6 Vortex Decorative Pendants

KROCEUS$12.969 rev

2mo ago

KROCEUS 30 PCS One Piece Themed Party Gift Bags Party Supplies Cute One Piece Anime Themed Party Birthday Decoration Gift Bags Suitable for Girls or Boys

KROCEUS$9.979 rev

2mo ago

KROCEUS 86Pcs One Piece Birthday Party Supplies Party Gifts and Toy Set for Luffy Theme Party

KROCEUS$23.0610 rev

3mo ago

98 PCS Birthday Party Supplies Party Decorations Include Theme Stickers Happy Birthday Banner Hanging Swirls Tablecloth Latex Balloons for Adult

Signreen$14.3814 rev

4mo ago

What buyers say about one piece birthday decorations

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

What buyers love

Quality-Overall24%

“This is a great quality set”

Value For Money9%

“Great price”

Advertised Vs Actual Product9%

“As advertised”

Gifting Purpose8%

“Perfect gift to my kid”

Color7%

“the colors are vibrant”

Size-Overall7%

“Good fit”

Design-Overall5%

“Cute design,”

Ease Of Use3%

“comfortable to wear”

Fun/Entertainment Experience3%

“an easy way to create a fun themed party”

Assembly/Installation2%

“easy to put up”

What buyers complain about

Size-Overall19%

“they are kind of tight”

Quality-Overall13%

“quality control may be an issue”

Advertised Vs Actual Product5%

“False advertising”

Thickness5%

“.Feels as thick as paper stickers”

Value For Money4%

“Way too expensive for what was received- not sure if I can even return it since its all opened now”

Color3%

“But I am taking away one star because the colors in the decorations were very dull”

Durability3%

“After a month of use the decal is destroyed”

Assembly/Installation3%

“Assembly is required”

Material Quality2%

“Awful quality material”

Ease Of Use2%

“didnt open easily”

Top return reasons

Size-Overall34%

Advertised Vs Actual Product13%

Quality-Overall11%

Value For Money7%

Functionality-Overall5%

Print Quality3%

Material Quality3%