Is mermaid birthday banner profitable to sell on Amazon United States?

The niche generates $47K/yr across 55 tracked products. 2 of 18 products launched in the last 360 days are still selling. 90-day search growth is +71.3%. Flapen's verdict: Worth a look (58/100).

How competitive is the mermaid birthday banner niche?

48 brands and 65 sellers compete. The top 5 products take 32% of clicks and top 5 brands hold 37% of demand.

What do buyers complain about in mermaid birthday banner?

Top complaints mined from reviews: Adhesion/Stickiness, Size-Overall, Durability. The return rate is 3.2%.

When does demand for mermaid birthday banner peak?

Demand peaks in Jun–Jul–Aug; the busiest month runs 4.3× the quietest.

What does it cost to enter the mermaid birthday banner niche?

Listings span $4.05–$27.54; the average listing price is $10.91 (sweet spot $15–$100). The average incumbent carries 632 reviews — the moat a new listing must climb.

mermaid birthday banner

Worth a look

Shows no brand lock-in (top 5 brands take 37% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Brand share

Incredible37%

top-5 brand share — no brand owns this niche

Competition

Great32%

top-5 click share — an open shelf

Growth

Great+71.3%

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

Review moat

Good632.49

avg incumbent reviews — the moat a new listing must climb

Conversion

Good6.0%

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

Price range

Good$4.05–$27.54

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

Returns

Okay3.2%

return rate — above 5% kills the launch gate

Avg price

Okay$10.91

avg listing price — sweet spot $15–$100

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Market size

Bad$47K

$47K/yr · 72K searches

Signals No Dominant Brand Low Review Barrier

According to Flapen's Amazon United States niche tracking, mermaid birthday banner is a $47K/yr Amazon United States market (72K searches/yr). The top 5 brands hold 37% of demand. Demand peaks in Jun–Jul–Aug. Verdict: Worth a look — 58/100.

Data updated Jul 22, 2026 · scored weekly · How we score niches

mermaid birthday banner market data

Units sold / yr: 4K–5K; avg 0–100/product
Revenue / yr: $44K–$55K; units × avg price
Conversion rate: 6.0%
Avg BSR: #3,116
Page quality: 0%
Prime: 100%
Sponsored: 93%
Out of stock: 10.2%
Avg brand age: 23 months
Avg seller age: 186 days

Competition & brand share

Clicks spread well past the top 5 (32% combined) — an open shelf where new products get seen.

Brands

48 rising

Sellers

Top-5 brand share

37%

Top 20: 77%

Top-5 click share

32%

Top 20: 70%

Open market

58%

KatchOn9%
Anor Wishlife8%
PERFQU8%
Lecheme6%
Hxezoc6%
Avezano5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +71.3% search growth over the last 90 days.

Peak months: Jun, Jul, Aug · busiest ÷ quietest = 4.3×

Open Trend

Top mermaid birthday banner search terms

mermaid birthday banner32K/yr +68.6%4.0% conv.
mermaid happy birthday banner14K/yr +70.6%5.8% conv.
mermaid banner9K/yr +73.6%2.6% conv.
happy birthday mermaid banner7K/yr +95.0%5.6% conv.
little mermaid birthday banner5K/yr +50.6%3.4% conv.
happy birthday banner mermaid4K/yr +80.3%5.8% conv.

All search terms

Top mermaid birthday banner 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

Anor WishLife Sparkle Banner Mermaid Birthday Decorations Mermaid Party Decorations for Girls Boys Kids Home Classroom Baby Shower 1st Birthday

Anor Wishlife$8.434.8★1,872 rev

Mermaid Birthday Banner - Mermaids Banner Mermaid Birthday Decorations for Girls Boys Kids - Mermaids Party Supplies Decoration for Ocean Theme Parties Birthdays Parties and Home Decor

PERFQU$6.514.6★146 rev

Lecheme Mermaid Birthday Backdrop Glitter Purple Mermaid Banner Happy Birthday Party Decorations for Girls Mermaid Photo Background 6x3.6 ft

Lecheme$9.164.8★65 rev

Mermaid Birthday Backdrop 7X5FT (82x59inch)

BUTEN$10.004.9★80 rev

Mermaid Birthday Decorations Mermaid Party Honeycomb Centerpieces Hanging Swirls Happy Birthday Banner Kit Ocean Mermaids Cutouts for Kids Under The Sea Baby Shower Party Supplies

CHUNNIN$12.634.9★24 rev

Newest

by launch date

Blue Seashell Happy Birthday Banner - Mermaid Birthday Party Decorations Mermaid Birthday Banner Ocean Beach Under The Sea Sign For Under The Sea Party Decorations

WAUAO$9.492 rev

3mo ago

Ufocusmi Mermaid Birthday Party Decorations Mermaid Birthday Banner

Ufocusmi$13.463 rev

4mo ago

Abilat Mermaid Birthday Banner Mermaid Birthday Decorations Under the Sea Theme Garland for Girls Ocean Theme Baby Shower Supplies

Abilat$4.6056 rev

5mo ago

Mermaid Party Decorations Happy Birthday Banner Mermaid Party Banner Garland for Birthday Party Decorations Mermaid Party Supplies

Hxezoc$4.0569 rev

6mo ago

Cruslheep Happy Birthday Banner Swallowtail Design Happy Birthday Sign for Backdrop Decor Purple and Blue Party Decorations Hanging Decor 13pcs

Cruslheep$5.2818 rev

7mo ago

What buyers say about mermaid birthday banner

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

What buyers love

Quality-Overall26%

“Product is great as expected no issues”

Color17%

“Color is accurate”

Advertised Vs Actual Product10%

“Just as pictured”

Assembly/Installation7%

“Easy to set up”

Brightness/Shine/Glow5%

“Cute birthday candle”

Design-Overall4%

“The design itself is really cute”

Ease Of Use4%

“Super cute and easy to use”

Durability4%

“Durable”

Value For Money4%

“The value for the money is great”

Material Quality2%

“The polyester fabric drapes nicely”

What buyers complain about

Adhesion/Stickiness9%

“Adhesive impossible to get off”

Size-Overall9%

“Runs a little big”

Durability9%

“rip easily”

Quality-Overall9%

“Cheap”

Smell8%

“Terrible chemical smell”

Strength8%

“Just very fragile”

Advertised Vs Actual Product4%

“Not like the picture”

Defective Material/Parts4%

“Came broken”

Color4%

“Absolutely filthy, covered in gray”

Thickness3%

“Very thin and a little see through”

Top return reasons

Size-Overall21%

Color18%

Value For Money14%

Advertised Vs Actual Product10%

Quality-Overall6%

Defective Material/Parts6%

Material Quality3%

Adhesion/Stickiness3%

Functionality-Overall2%

Product Condition2%

Common questions

Is mermaid birthday banner profitable to sell on Amazon United States?: The niche generates $47K/yr across 55 tracked products. 2 of 18 products launched in the last 360 days are still selling. 90-day search growth is +71.3%. Flapen's verdict: Worth a look (58/100).
How competitive is the mermaid birthday banner niche?: 48 brands and 65 sellers compete. The top 5 products take 32% of clicks and top 5 brands hold 37% of demand.
What do buyers complain about in mermaid birthday banner?: Top complaints mined from reviews: Adhesion/Stickiness, Size-Overall, Durability. The return rate is 3.2%.
When does demand for mermaid birthday banner peak?: Demand peaks in Jun–Jul–Aug; the busiest month runs 4.3× the quietest.
What does it cost to enter the mermaid birthday banner niche?: Listings span $4.05–$27.54; the average listing price is $10.91 (sweet spot $15–$100). The average incumbent carries 632 reviews — the moat a new listing must climb.