Flounder Costume Baby
Skip itA small market ($14K/yr) — this niche doesn't clear our bar today.
Avg price
Incredible$30.32avg listing price — sweet spot $15–$100
Price range
Great$9.14–$68.92cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good698.71avg incumbent reviews — the moat a new listing must climb
Competition
Good51%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay83%top-5 brand share — brands hold most of the demand
Growth
Bad-2.4%90-day search growth — must beat 0% to launch
Returns
Bad8.6%return rate — above 5% kills the launch gate
Market size
Bad$14K$14K/yr · 206K searches
Conversion
Bad0.2%search→purchase rate — share of searches ending in a sale
Is flounder costume baby profitable on Amazon?
According to Flapen's Amazon United States niche tracking, flounder costume baby is a $14K/yr Amazon United States market (206K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Aug–Sep–Oct. Verdict: Skip it — 34/100.
Data updated Jul 10, 2026 · scored weekly · How we score niches
flounder costume baby market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 2K–2K
- avg 0–100/product
- Revenue / yr
- $45K–$61K
- units × avg price
- Conversion rate
- 0.2%
- Avg BSR
- #11,609
- Page quality
- 0%
- Prime
- 56%
- Sponsored
- 32%
- Out of stock
- 1.4%
- Avg brand age
- 35 months
- Avg seller age
- 183 days
Competition: brands, sellers & click share
The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.Brands
18 rising
Sellers
37
Top-5 brand share
83%
Top 20: 100%
Top-5 click share
51%
Top 20: 88%
Open market
13%
- Fun Costumes56%
- Frietlebird12%
- vavalad6%
- v285%
- IBTOM CASTLE4%
- Disguise4%
- Open — no brand owns it (12 brands, 13%)
flounder costume baby demand & seasonality
Weekly Amazon search volume, last 79 weeks — -2.4% search growth over the last 90 days.Peak months: Aug, Sep, Oct · busiest ÷ quietest = 24.9×
Top flounder costume baby search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- flounder costume69K/yr
- flounder costume kids10K/yr
- baby flounder costume12K/yr
- flounder costume baby53K/yr
- flounder baby costume9K/yr
- flounder costume toddler33K/yr
- flounder toddler costume4K/yr
- toddler flounder costume6K/yr
- infant flounder costume4K/yr
- baby flounder costume infant3K/yr
Top flounder costume baby products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Fun Costumes Disney Adult Flounder Costume Little Mermaid Halloween Yellow Fish Dress for Men and Women Large/X-Large
Fun Costumes$67.474.3★87 rev
Fun Costumes Disney The Little Mermaid Flounder Infant Halloween Cosplay Ocean Beach Theme Party & Dress Up 12/18 Months
Fun Costumes$33.074.7★356 rev
Disney Flounder Costume Dress Toddlers 4T
Fun Costumes$38.964.1★20 rev
Frietlebird My First Halloween Baby Girl Outfit Toddler Flounder Costume Long Sleeve Romper with Tutu Skirt Infant Halloween Costumes (A-Yellow 12-18 Months)
Frietlebird$17.874.7★23 rev
vavalad Adult Loose - fitting Onesie Costume Halloween Christmas Cosplay Funny Costume Women Men
vavalad$34.354.6★285 rev
Newest
by launch date
Mieeyali Halloween Newborn Baby Boy Girl Clothes Crab Crawfish Costume Gender Neutral Bodysuit Romper Sea Outfit (Orange 9-18 Months)
Mieeyali$15.8133 rev
Frietlebird My First Halloween Baby Girl Outfit Toddler Flounder Costume Long Sleeve Romper with Tutu Skirt Infant Halloween Costumes (A-Yellow 12-18 Months)
Frietlebird$17.8723 rev
Frietlebird Baby Girl Halloween Outfit Baby Flounder Costume Long Sleeve Romper with Tutu Skirt Sets Infant Halloween Costumes (A-Yellow 3-6 Months)
Frietlebird$18.5723 rev
Frietlebird My First Halloween Outfit Girl Baby Flounder Costume Long Sleeve Romper with Tutu Skirt Sets Infant Halloween Costumes (A-Yellow 6-12 Months)
Frietlebird$19.0523 rev
HAMUTH Mouse Ear Mouse Ear Headband for Women Girls Adult Sequin Bow Hair Band for Party Trip Parks Costume Cosplay Essentials.
HAMUTH$9.14501 rev
Trending
90-day click momentumvavalad Adult Loose - fitting Onesie Costume Halloween Christmas Cosplay Funny Costume Women Men
vavalad$34.354.6★
Alaroo Shiny Fish Scale Mermaid Leggings for Women Pants Green M
Alaroo$16.034.2★
Frietlebird My First Halloween Outfit Girl Baby Flounder Costume Long Sleeve Romper with Tutu Skirt Sets Infant Halloween Costumes (A-Yellow 6-12 Months)
Frietlebird$19.054.7★
Fun Costumes Disney Adult Flounder Costume Little Mermaid Flounder Halloween Costume Yellow Fish Costume for Men and Women | Small/Medium
Fun Costumes$66.994.3★
Fun Costumes Little Mermaid Flotsam and Jetsam Costume Scarf
Fun Costumes$27.174.7★
What reviews say buyers love and hate about flounder costume baby
What buyers praise and complain about, mined from review topics.What buyers love
“surprisingly well made”
“fits well”
“Beautiful colors”
“These were a fun gift for my daughter who played flounder in the high school play”
“Best costume - great material”
“Lightweight doesnt hurt in an hour”
“So cute and kept my baby warm”
“So cute and soft and easy to put on over clothes”
“Sparkle”
“Breathable fabric”
What buyers complain about
“these may be short on you”
“Innacurate description”
“It was not what I expected as far as color”
Top return reasons
Common flounder costume baby questions
- Is flounder costume baby profitable to sell on Amazon United States?
- The niche generates $14K/yr across 34 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -2.4%. Flapen's verdict: Skip it (34/100).
- How competitive is the flounder costume baby niche?
- 18 brands and 37 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 83% of demand.
- What do buyers complain about in flounder costume baby?
- Top complaints mined from reviews: Size-Overall, Advertised Vs Actual Product, Color. The return rate is 8.6% — above our launch gate.
- When does demand for flounder costume baby peak?
- Demand peaks in Aug–Sep–Oct; the busiest month runs 24.9× the quietest.
- What does it cost to enter the flounder costume baby niche?
- Listings span $9.14–$68.92; the average listing price is $30.32 (sweet spot $15–$100). The average incumbent carries 699 reviews — the moat a new listing must climb.