---
title: "A League of Their Own Costume Kids — $9K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/a-league-of-their-own-costume-kids"
last_updated: "2026-08-09T08:32:02.667Z"
locale: en
meta:
description: "Niche score 32/100 · $9K/yr market · 29K searches/yr · $30.75 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 32/100 · $9K/yr market · 29K searches/yr · $30.75 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "A League of Their Own Costume Kids — $9K/yr Amazon US Niche (2026) - Flapen"
---
# **a league of their own costume kids**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 2Growth 55Conversion 13Competition 37Returns 0Price range 91Avg price 95Brand share 0Review moat 91Quality gap 27
**Avg price**
**Incredible****$30.75**
avg listing price — sweet spot $15–$100
**Review moat**
**Great****176.15**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Great****$13.72–$39.84**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Good****+28.1%**
90-day search growth — must beat 0% to launch
**Competition**
**Okay****63%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Bad****1.0%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$9K**
$9K/yr · 29K searches
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Returns**
**Bad****17.7%**
return rate — above 5% kills the launch gate
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, a league of their own costume kids is a $9K/yr Amazon United States market (29K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 32/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **a league of their own costume kids market data**
- **Units sold / yr**
- **250–500**
- avg 0–100/product
- **Revenue / yr**
- **$8K–$15K**
- units × avg price
- **Conversion rate**
- **1.0%**
- **Avg BSR**
- **#2,483**
- **Page quality**
- **0%**
- **Prime**
- **62%**
- **Sponsored**
- **54%**
- **Out of stock**
- **30.5%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **225 days**
## **Competition & brand share**
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**5 **—flat
**Sellers**
**6**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**63%**
Top 20: 100%
**Open market**
**0%**
- Morph42% - Snirczs30% - Fun Costumes16% - Spirit Halloween7% - Okbebe4%
## **Demand & seasonality**
Weekly Amazon search volume, last 84 weeks — +28.1% search growth over the last 90 days.
4K3KSpike '25Spike '26 seasonDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Sep, Oct · busiest ÷ quietest = 109.4×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/a-league-of-their-own-costume-kids/trend)
## **Top a league of their own costume kids search terms**
- **league of their own costume kids**11K/yr+11.4%0.8% conv. - **a league of their own costume kids**12K/yr+95.3%0.3% conv. - **a league of their own costume girls**2K/yr-14.1%0.5% conv. - **rockford peaches costume kids**3K/yr+110.7%1.1% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/a-league-of-their-own-costume-kids/search-terms)
## **Top a league of their own costume kids 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.
0%5%$45610%$91215%$1K20%$2K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Snirczs Kids Baseball Costume Dress with Hat and Accessories Sporty Uniform Outfit for Girls Halloween (S)**Snirczs**$29.78**4.9★23 rev](https://www.amazon.com/dp/B0FG7R3VQQ) [2**Morph - Pink Baseball Costume For Kids Baseball Player Costume Softball Halloween Costumes For Girls Movie Character Halloween Costumes For Girls And Toddler 7-9 Years**Morph**$32.21**4.5★106 rev](https://www.amazon.com/dp/B0BGYDJZZ9) [3**Snirczs Kids Baseball Costume Dress with Hat and Accessories Sporty Uniform Outfit for Girls Halloween (XS)**Snirczs**$29.67**4.9★23 rev](https://www.amazon.com/dp/B0FG7N1F5X) [4**Morph - Pink Baseball Costume For Kids Baseball Player Costume Softball Halloween Costumes For Girls Movie Character Halloween Costumes For Girls And Toddler 10-12 Years**Morph**$31.95**4.5★106 rev](https://www.amazon.com/dp/B0BGYFLVRQ) [5**Spirit Halloween A League of Their Own Kids Dottie Costume | Officially Licensed | Dottie Dress**Spirit Halloween**$39.36**4.3★7 rev](https://www.amazon.com/dp/B0D4SP3FJZ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Okbebe Kids Baseball Player Costume Halloween Cosplay Movie Character Baseball Uniform Costumes For Girls (Pink 7-9Y)**Okbebe**$25.01**13 rev1y ago](https://www.amazon.com/dp/B0FGH61CX1) [**Snirczs Kids Baseball Costume Dress with Hat and Accessories Sporty Uniform Outfit for Girls Halloween (S)**Snirczs**$29.78**23 rev1y ago](https://www.amazon.com/dp/B0FG7R3VQQ) [**Snirczs Kids Baseball Costume Dress with Hat and Accessories Sporty Uniform Outfit for Girls Halloween (XS)**Snirczs**$29.67**23 rev1y ago](https://www.amazon.com/dp/B0FG7N1F5X) [**Spirit Halloween A League of Their Own Kids Dottie Costume | Officially Licensed | Dottie Dress**Spirit Halloween**$39.36**7 rev2y ago](https://www.amazon.com/dp/B0D4SP3FJZ) [**Fun Costumes Kids A League of Their Own Baseball Cap | Official Child Rockford Peaches Baseball Hat for Boys & Girls ST Red**Fun Costumes**$13.72**6 rev3y ago](https://www.amazon.com/dp/B0C3T1CF5R)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Fun Costumes Kids A League of Their Own Baseball Cap | Official Child Rockford Peaches Baseball Hat for Boys & Girls ST Red**Fun Costumes**$13.72**5.0★**▲ 1000%**](https://www.amazon.com/dp/B0C3T1CF5R) [**Okbebe Kids Baseball Player Costume Halloween Cosplay Movie Character Baseball Uniform Costumes For Girls (Pink 7-9Y)**Okbebe**$25.01**4.4★**▲ 982%**](https://www.amazon.com/dp/B0FGH61CX1) [**Morph - Pink Baseball Costume For Kids Baseball Player Costume Softball Halloween Costumes For Girls Movie Character Halloween Costumes For Girls And Toddler 3-4 Years**Morph**$31.17**4.5★**▲ 272%**](https://www.amazon.com/dp/B0BGYFLMRB) [**Snirczs Kids Baseball Costume Dress with Hat and Accessories Sporty Uniform Outfit for Girls Halloween (XS)**Snirczs**$29.67**4.9★**▲ 108%**](https://www.amazon.com/dp/B0FG7N1F5X) [**Spirit Halloween A League of Their Own Kids Dottie Costume | Officially Licensed | Dottie Dress**Spirit Halloween**$39.36**4.3★**▲ 87%**](https://www.amazon.com/dp/B0D4SP3FJZ)
**~~View all trending →~~**
## **What buyers say about a league of their own costume kids**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**38%
*“Fit was good”*
**Quality-Overall**25%
*“actually well made”*
**Design-Overall**5%
*“Cute design and looks great in pictures,”*
### **What buyers complain about **
**Durability**35%
*“Bat only lasted a few days”*
**Thin**10%
*“The material feels a bit thin”*
**Size-Overall**10%
*“the fit isnt perfect”*
**Quality-Overall**10%
*“the quality could be better”*
### **Top return reasons **
**Size-Overall**77%
**Product Condition**8%
**Advertised Vs Actual Product**6%
**Material Quality**3%
**Color**3%
**Quality-Overall**1%
**Design-Overall**1%
**Ease Of Use**1%
**Comfort-Overall**1%
**Accuracy-Overall**1%
## **Common questions**
- **Is a league of their own costume kids profitable to sell on Amazon United States?**
- The niche generates $9K/yr across 13 tracked products. 90-day search growth is +28.1%. Flapen's verdict: Skip it (32/100).
- **How competitive is the a league of their own costume kids niche?**
- 5 brands and 6 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in a league of their own costume kids?**
- Top complaints mined from reviews: Durability, Thin, Size-Overall. The return rate is 17.7% — above our launch gate.
- **When does demand for a league of their own costume kids peak?**
- Demand peaks in Sep–Oct; the busiest month runs 109.4× the quietest.
- **What does it cost to enter the a league of their own costume kids niche?**
- Listings span $13.72–$39.84; the average listing price is $30.75 (sweet spot $15–$100). The average incumbent carries 176 reviews — the moat a new listing must climb.
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