barnacle boy costume
Skip itHigh returns (9.9%) — this niche doesn't clear our bar today.
Review moat
Incredible55.5avg incumbent reviews — the moat a new listing must climb
Avg price
Incredible$25.36avg listing price — sweet spot $15–$100
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Price range
Great$6.85–$48.66cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+5.6%90-day search growth — must beat 0% to launch
Conversion
Bad1.8%search→purchase rate — share of searches ending in a sale
Brand share
Bad93%top-5 brand share — brand-locked demand
Competition
Bad82%top-5 click share — a locked-up shelf
Market size
Bad$41K$41K/yr · 88K searches
Returns
Bad9.9%return rate — above 5% kills the launch gate
According to Flapen's Amazon United States niche tracking, barnacle boy costume is a $41K/yr Amazon United States market (88K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Oct–Nov. Verdict: Skip it — 35/100.
Data updated Jul 10, 2026 · scored weekly · How we score niches
barnacle boy costume market data
- Units sold / yr
- 3K–4K
- avg 0–100/product
- Revenue / yr
- $76K–$101K
- units × avg price
- Conversion rate
- 1.8%
- Avg BSR
- #2,918
- Page quality
- 0%
- Prime
- 90%
- Sponsored
- 60%
- Out of stock
- 32.4%
- Avg brand age
- 34 months
- Avg seller age
- 213 days
Competition & brand share
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 falling
Sellers
8
Top-5 brand share
93%
Top 20: 100%
Top-5 click share
82%
Top 20: 100%
Open market
3%
- Matiniy61%
- EchoElce11%
- Spirit Halloween8%
- JQAKFIY7%
- Bgfhna5%
- Aniler4%
- Open — no brand owns it (1 brand, 3%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +5.6% search growth over the last 90 days.Peak months: Oct, Nov · busiest ÷ quietest = 41.5×
Top barnacle boy costume search terms
- barnacle boy costume61K/yr
- barnacle boy7K/yr
- barnacle boy costume women13K/yr
- barnacle boy costume men8K/yr
Top barnacle boy costume 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 10 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Matiniy Halloween Cosplay Accessories Set Include Red Long Sleeves White Hat Blue Gloves Scarf Gloves Black Glasses (L)
Matiniy$23.994.2★16 rev
EchoElce 5 PCS Halloween Sailor Costume Accessories Include Sailor Hat Blue Scarf Gloves Socks Eye Mask for Women Men Halloween Party Cosplay
EchoElce$19.413.9★17 rev
Spirit Halloween Adult Spongebob Squarepants Barnacle Boy Costume
Spirit Halloween$48.664.3★100 rev
5 PCS Halloween Sailor Costume Include Sailor Hat Scarf Gloves Socks Glasses for Men Women Cartoon Character Dress Up (Medium) Bluewhite
Matiniy$18.684.4★78 rev
Bgfhna 5 PCS Halloween Sailor Costume Sailor Hat Scarf Gloves Blue Athletic Compression Socks Glasses for Men Women Dress Up
Bgfhna$15.684.5★4 rev
Newest
by launch dateBgfhna 5 PCS Halloween Sailor Costume Sailor Hat Scarf Gloves Blue Athletic Compression Socks Glasses for Men Women Dress Up
Bgfhna$15.684 rev
JQAKFIY Barnacle Boy Costume Mermaid Men Costumes Adult Halloween Character Cosplay Outfit Set with Hat Gloves Scarf Prop M
JQAKFIY$45.936 rev
JQAKFIY Barnacle Boy Costume Mermaid Men Costumes Adult Halloween Character Cosplay Outfit Set with Hat Gloves Scarf Prop XL
JQAKFIY$46.046 rev
EchoElce 5 PCS Halloween Sailor Costume Accessories Include Sailor Hat Blue Scarf Gloves Socks Eye Mask for Women Men Halloween Party Cosplay
EchoElce$19.4117 rev
Matiniy Halloween Cosplay Accessories Set Include Red Long Sleeves White Hat Blue Gloves Scarf Gloves Black Glasses (L)
Matiniy$23.9916 rev
Trending
90-day click momentumMatiniy Halloween Cosplay Accessories Set Include Red Long Sleeves White Hat Blue Gloves Scarf Gloves Black Glasses (L)
Matiniy$23.994.2★
Aniler Unisex 18 Elbow Length Full Finger Costume Party Stretchy Gloves (One Size Navy Blue)
Aniler$9.694.4★
JQAKFIY Barnacle Boy Costume Mermaid Men Costumes Adult Halloween Character Cosplay Outfit Set with Hat Gloves Scarf Prop M
JQAKFIY$45.934.1★
JQAKFIY Barnacle Boy Costume Mermaid Men Costumes Adult Halloween Character Cosplay Outfit Set with Hat Gloves Scarf Prop XL
JQAKFIY$46.044.1★
Matiniy 5 PCS Halloween Sailor Costume Include Sailor Hat Scarf Gloves Socks Glasses for Men Women Cartoon Character Dress Up (Large)
Matiniy$18.674.4★
What buyers say about barnacle boy costume
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality”
What buyers complain about
“Definitely runs tight”
“The hat is a little itchy”
Top return reasons
Common questions
- Is barnacle boy costume profitable to sell on Amazon United States?
- The niche generates $41K/yr across 10 tracked products. 90-day search growth is +5.6%. Flapen's verdict: Skip it (35/100).
- How competitive is the barnacle boy costume niche?
- 7 brands and 8 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 93% of demand.
- What do buyers complain about in barnacle boy costume?
- Top complaints mined from reviews: Size-Overall, Allergies. The return rate is 9.9% — above our launch gate.
- When does demand for barnacle boy costume peak?
- Demand peaks in Oct–Nov; the busiest month runs 41.5× the quietest.
- What does it cost to enter the barnacle boy costume niche?
- Listings span $6.85–$48.66; the average listing price is $25.36 (sweet spot $15–$100). The average incumbent carries 56 reviews — the moat a new listing must climb.