black mermaid birthday decorations
Skip itA small market ($0/yr) — this niche doesn't clear our bar today.
Review moat
Great353.56avg incumbent reviews — the moat a new listing must climb
Avg price
Good$14.80avg listing price — sweet spot $15–$100
Returns
Good2.2%return rate — above 5% kills the launch gate
Price range
Good$6.85–$27.44cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+15.4%90-day search growth — must beat 0% to launch
Brand share
Okay89%top-5 brand share — brands hold most of the demand
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Competition
Bad86%top-5 click share — a locked-up shelf
Market size
Bad$0$0/yr · 8K searches
Conversion
Bad0.0%search→purchase rate — share of searches ending in a sale
According to Flapen's Amazon United States niche tracking, black mermaid birthday decorations is a $0/yr Amazon United States market (8K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Jul–Aug–Sep. Verdict: Skip it — 31/100.
Data updated Jul 10, 2026 · scored weekly · How we score niches
black mermaid birthday decorations market data
- Units sold / yr
- 100–250
- avg 0–100/product
- Revenue / yr
- $1K–$4K
- units × avg price
- Conversion rate
- 0.0%
- Avg BSR
- #2,282
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 89%
- Out of stock
- 9.5%
- Avg brand age
- 25 months
- Avg seller age
- 197 days
Competition & brand share
The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.Brands
8 falling
Sellers
9
Top-5 brand share
89%
Top 20: 100%
Top-5 click share
86%
Top 20: 100%
Open market
6%
- CIEHER59%
- NKPDAXM9%
- Linlmeet8%
- Ezcpigei8%
- Tutu and Sian5%
- Doctor Unicorn4%
- Open — no brand owns it (2 brands, 6%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +15.4% search growth over the last 90 days.Peak months: Jul, Aug, Sep · busiest ÷ quietest = 3.9×
Top black mermaid birthday decorations search terms
- black little mermaid party decorations4K/yr
- black mermaid birthday decorations2K/yr
- black mermaid party decorations3K/yr
- black little mermaid party decorations 202324/yr
Top black mermaid 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.
All 9 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
CIEHER Mermaid Crown Headband Seashell Crown for Little Mermaid Birthday Party Decorations Mermaid Accessories Halloween Costumes
CIEHER$9.534.7★348 rev
Mermaid Birthday Party Supplies Black Mermaid Cake Topper Decorations for Mermaid Party Supplies Decor (B6)
Linlmeet$8.894.5★35 rev
Ezcpigei Little Mermaid Birthday Party Decoration Pack - Mermaid Birthday Banner Cake Topper Latex Balloons Cupcake Toppers
Ezcpigei$9.954.6★13 rev
NKPDAXM Mermaid Birthday Decorations Include Plates Napkins Cups Cutlery Hanging Swirls Banner Cake & Cupcake Toppers Balloons Tablecloth for Mermaid Party Decorations Serve 20
NKPDAXM$22.614.8★189 rev
Mermaid Outfit Set Shirt Rainbow Tutu Dress Satin Sash Headband Birthday Gifts for Girls Costume (Mermaid B2 11-12 Years)
Tutu and Sian$27.444.8★483 rev
Newest
by launch date
NKPDAXM Mermaid Birthday Decorations Includes Banner Backdrop Foil & Latex Balloons Hanging Swirls Cake & Cupcake Toppers Honeycomb Centerpieces for Girls Mermaid Party Decorations
NKPDAXM$17.77163 rev
NKPDAXM Mermaid Birthday Decorations Include Plates Napkins Cups Cutlery Hanging Swirls Banner Cake & Cupcake Toppers Balloons Tablecloth for Mermaid Party Decorations Serve 20
NKPDAXM$22.61189 rev
Mermaid Themed Birthday Candles Number 5 Girls Glitter Birthday Party Supplies Anniversary Party Decor 2.87 inch Cake Topper Decorations (Mermaid Themed Number 5)
fauaoy$6.85850 rev
Doctor Unicorn Birthday Girls Mermaid Outfit Set Costume Tutu Skirt Dress Mermaid Birthday Shirt Headband & Satin Sash (Black-1 3-4 Years)
Doctor Unicorn$20.21887 rev
Didder Mermaid Themed Party Outfit: Sash Crown and Decorations for Girls
Didder$9.92214 rev
Trending
90-day click momentumCIEHER Mermaid Crown Headband Seashell Crown for Little Mermaid Birthday Party Decorations Mermaid Accessories Halloween Costumes
CIEHER$9.534.7★
Mermaid Outfit Set Shirt Rainbow Tutu Dress Satin Sash Headband Birthday Gifts for Girls Costume (Mermaid B2 11-12 Years)
Tutu and Sian$27.444.8★
NKPDAXM Mermaid Birthday Decorations Includes Banner Backdrop Foil & Latex Balloons Hanging Swirls Cake & Cupcake Toppers Honeycomb Centerpieces for Girls Mermaid Party Decorations
NKPDAXM$17.774.6★
Didder Mermaid Themed Party Outfit: Sash Crown and Decorations for Girls
Didder$9.924.6★
NKPDAXM Mermaid Birthday Decorations Include Plates Napkins Cups Cutlery Hanging Swirls Banner Cake & Cupcake Toppers Balloons Tablecloth for Mermaid Party Decorations Serve 20
NKPDAXM$22.614.8★
What buyers say about black mermaid birthday decorations
What buyers praise and complain about, mined from review topics.What buyers love
“Its extremely well made”
“Cute as Pictured”
“worth the money”
“Cute birthday candle”
“Pretty”
“turned out so cute all put together”
“It was the ideal size—substantial enough to be the focal point of the cake without completely dominating the design”
“The crown is adorable and felt durable”
“Beautiful decor”
“Everything was easy to use”
What buyers complain about
“Came broken”
“just a little large for a 6 year old”
“flimsy plates”
“Doesnt gonna pre assembled”
Top return reasons
Common questions
- Is black mermaid birthday decorations profitable to sell on Amazon United States?
- The niche generates $0/yr across 9 tracked products. 90-day search growth is +15.4%. Flapen's verdict: Skip it (31/100).
- How competitive is the black mermaid birthday decorations niche?
- 8 brands and 9 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 89% of demand.
- What do buyers complain about in black mermaid birthday decorations?
- Top complaints mined from reviews: Defective Material/Parts, Size-Overall, Strength. The return rate is 2.2%.
- When does demand for black mermaid birthday decorations peak?
- Demand peaks in Jul–Aug–Sep; the busiest month runs 3.9× the quietest.
- What does it cost to enter the black mermaid birthday decorations niche?
- Listings span $6.85–$27.44; the average listing price is $14.80 (sweet spot $15–$100). The average incumbent carries 354 reviews — the moat a new listing must climb.