---
title: "Flounder Costume Baby — $1K/mo Amazon US Product Research"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/flounder-costume-baby"
last_updated: "2026-08-12T16:53:01.955Z"
locale: en
meta:
description: "Amazon product research for flounder costume baby: $1K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for flounder costume baby: $1K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Flounder Costume Baby — $1K/mo Amazon US Product Research"
---
# **Flounder Costume Baby**
**Skip it**
A small market ($14K/yr) — this niche doesn't clear our bar today.
Market size 3Growth 24Conversion 3Competition 56Returns 12Price range 87Avg price 95Brand share 36Review moat 70Quality gap 40
**Avg price**
**Incredible****$30.32**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.14–$68.92**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****698.71**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Good****51%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****83%**
top-5 brand share — brands hold most of the demand
**Growth**
**Bad****-2.4%**
90-day search growth — must beat 0% to launch
**Returns**
**Bad****8.6%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$14K**
$14K/yr · 206K searches
**Conversion**
**Bad****0.2%**
search→purchase rate — share of searches ending in a sale
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
## **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 ~~](https://flapen.com/research/methodology)
## **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.
12K8KSpike '25Spike '26 seasonJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Aug, Sep, Oct · busiest ÷ quietest = 24.9×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/flounder-costume-baby/trend)
## **Top flounder costume baby search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **flounder costume**69K/yr-3.6%0.7% conv. - **flounder costume kids**10K/yr+23.0%0.7% conv. - **baby flounder costume**12K/yr+70.7%0.1% conv. - **flounder costume baby**53K/yr-30.0%0.2% conv. - **flounder baby costume**9K/yr+23.7%0.3% conv. - **flounder costume toddler**33K/yr-24.8%0.2% conv. - **flounder toddler costume**4K/yr+32.6%0.0% conv. - **toddler flounder costume**6K/yr-2.6%1.3% conv. - **infant flounder costume**4K/yr-2.0%0.0% conv. - **baby flounder costume infant**3K/yr-92.5%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/flounder-costume-baby/search-terms)
## **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.
0%4%$5498%$1K12%$2K16%$2K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**Fun Costumes Disney Adult Flounder Costume Little Mermaid Halloween Yellow Fish Dress for Men and Women Large/X-Large**Fun Costumes**$67.47**4.3★87 rev](https://www.amazon.com/dp/B0B75Q1HTN) [2**Fun Costumes Disney The Little Mermaid Flounder Infant Halloween Cosplay Ocean Beach Theme Party & Dress Up 12/18 Months**Fun Costumes**$33.07**4.7★356 rev](https://www.amazon.com/dp/B0BK7GB6Z1) [3**Disney Flounder Costume Dress Toddlers 4T**Fun Costumes**$38.96**4.1★20 rev](https://www.amazon.com/dp/B0CBSM8FX8) [4**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**$17.87**4.7★23 rev](https://www.amazon.com/dp/B0FD71YJ7H) [5**vavalad Adult Loose - fitting Onesie Costume Halloween Christmas Cosplay Funny Costume Women Men**vavalad**$34.35**4.6★285 rev](https://www.amazon.com/dp/B0B6PF4VQV)
**~~View all top sellers →~~**
### **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**$15.81**33 rev1y ago](https://www.amazon.com/dp/B0FGQB3G18) [**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**$17.87**23 rev1y ago](https://www.amazon.com/dp/B0FD71YJ7H) [**Frietlebird Baby Girl Halloween Outfit Baby Flounder Costume Long Sleeve Romper with Tutu Skirt Sets Infant Halloween Costumes (A-Yellow 3-6 Months)**Frietlebird**$18.57**23 rev1y ago](https://www.amazon.com/dp/B0FD725J3T) [**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**$19.05**23 rev1y ago](https://www.amazon.com/dp/B0FD73BJ2S) [**HAMUTH Mouse Ear Mouse Ear Headband for Women Girls Adult Sequin Bow Hair Band for Party Trip Parks Costume Cosplay Essentials.**HAMUTH**$9.14**501 rev1y ago](https://www.amazon.com/dp/B0F5Q23TZZ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**vavalad Adult Loose - fitting Onesie Costume Halloween Christmas Cosplay Funny Costume Women Men**vavalad**$34.35**4.6★**▲ 886%**](https://www.amazon.com/dp/B0B6PF4VQV) [**Alaroo Shiny Fish Scale Mermaid Leggings for Women Pants Green M**Alaroo**$16.03**4.2★**▲ 754%**](https://www.amazon.com/dp/B01CN3WNI8) [**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**$19.05**4.7★**▲ 676%**](https://www.amazon.com/dp/B0FD73BJ2S) [**Fun Costumes Disney Adult Flounder Costume Little Mermaid Flounder Halloween Costume Yellow Fish Costume for Men and Women | Small/Medium**Fun Costumes**$66.99**4.3★**▲ 617%**](https://www.amazon.com/dp/B00O38M04Y) [**Fun Costumes Little Mermaid Flotsam and Jetsam Costume Scarf**Fun Costumes**$27.17**4.7★**▲ 467%**](https://www.amazon.com/dp/B09Q6ZCZRR)
**~~View all trending →~~**
## **What reviews say buyers love and hate about flounder costume baby**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**33%
*“surprisingly well made”*
**Size-Overall**21%
*“fits well”*
**Color**8%
*“Beautiful colors”*
**Gifting Purpose**6%
*“These were a fun gift for my daughter who played flounder in the high school play”*
**Material Quality**6%
*“Best costume - great material”*
**Weight Light**6%
*“Lightweight doesnt hurt in an hour”*
**Warmth**5%
*“So cute and kept my baby warm”*
**Soft Feel**3%
*“So cute and soft and easy to put on over clothes”*
**Brightness/Shine/Glow**3%
*“Sparkle”*
**Breathability**3%
*“Breathable fabric”*
### **What buyers complain about **
**Size-Overall**58%
*“these may be short on you”*
**Advertised Vs Actual Product**13%
*“Innacurate description”*
**Color**13%
*“It was not what I expected as far as color”*
### **Top return reasons **
**Size-Overall**55%
**Waist Fit**11%
**Length**8%
**Color**4%
**Advertised Vs Actual Product**3%
**Quality-Overall**2%
**Material Quality**2%
**Arm Fit**2%
**Wrist Fit**2%
**Shape/Style**2%
## **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.
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