---
title: "Baseball Sister Shirt — $9K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/baseball-sister-shirt"
last_updated: "2026-08-09T13:30:47.481Z"
locale: en
meta:
description: "Niche score 45/100 · $9K/yr market · 109K searches/yr · $13.76 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 45/100 · $9K/yr market · 109K searches/yr · $13.76 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Baseball Sister Shirt — $9K/yr Amazon US Niche (2026) - Flapen"
---
# **baseball sister shirt**
**Skip it**
A small market ($9K/yr) — this niche doesn't clear our bar today.
Market size 2Growth 23Conversion 8Competition 95Returns 45Price range 65Avg price 65Brand share 85Review moat 96Quality gap 21
**Review moat**
**Incredible****88.33**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Great****20%**
top-5 click share — an open shelf
**Brand share**
**Great****50%**
top-5 brand share — no brand owns this niche
**Avg price**
**Good****$13.76**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$7.17–$29.41**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Okay****3.4%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-3.6%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Bad****0.6%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$9K**
$9K/yr · 109K searches
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United States niche tracking, baseball sister shirt is a $9K/yr Amazon United States market (109K searches/yr). The top 5 brands hold 50% of demand. Demand peaks in Mar–Apr–May. Verdict: Skip it — 45/100.
Data updated Jul 8, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **baseball sister shirt market data**
- **Units sold / yr**
- **2K–2K**
- avg 0–100/product
- **Revenue / yr**
- **$21K–$28K**
- units × avg price
- **Conversion rate**
- **0.6%**
- **Avg BSR**
- **#4,466**
- **Page quality**
- **0%**
- **Prime**
- **99%**
- **Sponsored**
- **92%**
- **Out of stock**
- **8.1%**
- **Avg brand age**
- **23 months**
- **Avg seller age**
- **177 days**
## **Competition & brand share**
Clicks spread well past the top 5 (20% combined) — an open shelf where new products get seen.
**Brands**
**53 **▲rising
**Sellers**
**42**
**Top-5 brand share**
**50%**
Top 20: 82%
**Top-5 click share**
**20%**
Top 20: 45%
**Open market**
**45%**
- FRYAID16% - NQIQO10% - AG AGUU9% - Yawtaut7% - GLIGLITTR6% - MULOIUDZ5%
## **Demand & seasonality**
Weekly Amazon search volume, last 62 weeks — -3.6% search growth over the last 90 days.
5K4KSpike '25Spike '26 seasonMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Mar, Apr, May · busiest ÷ quietest = 17.5×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/baseball-sister-shirt/trend)
## **Top baseball sister shirt search terms**
- **baseball sister shirt**39K/yr-11.8%1.4% conv. - **baseball sister**31K/yr-19.3%0.8% conv. - **girls baseball shirt**26K/yr+39.4%0.7% conv. - **toddler girl baseball shirt**7K/yr-0.4%0.4% conv. - **sister baseball shirt**5K/yr+5.2%1.1% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/baseball-sister-shirt/search-terms)
## **Top baseball sister shirt 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%2%$1804%$3596%$5398%$7191101001K 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**NQIQO Baseball Sister Shirt Im Just Here for The Snacks Tshirt Pink 2-3T**NQIQO**$13.56**4.8★21 rev](https://www.amazon.com/dp/B0G5PCSBK8) [2**FRYAID Toddler Baseball Sister Shirt Baby Girl Baseball Outfit Big Sister Shirt Birthday Girl T-Shirt Summer Cotton Tee Top White**FRYAID**$11.42**4.8★199 rev](https://www.amazon.com/dp/B0D2TJW32D) [3**AG AGUU Toddler Girl Baseball Shirts Baseball Sister T-Shirt Im Just Here for The Snacks Tees Game Day Outfit Ballgame Tops(White 2-3T)**AG AGUU**$13.12**4.7★39 rev](https://www.amazon.com/dp/B0DZXLV479) [4**NQIQO Baseball Sister Shirt Im Just Here for The Snacks Tshirt Pink 3-4T**NQIQO**$13.42**4.8★21 rev](https://www.amazon.com/dp/B0G5PD6H7Q) [5**GLIGLITTR Toddler Baby Girl Baseball Sister Shirt Big Sister Tshirt Im Just Here for The Snack Game Day Outfit Summer Tee Top(White 4-5T)**GLIGLITTR**$12.54**4.7★48 rev](https://www.amazon.com/dp/B0F131VWHS)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**BeWithYou Girls Baseball Shirt Kids Cute Game Day Shirts Coquette Baseball Bow Graphic Tees Preppy Funny Aesthetic Trendy TopWhite 150**BeWithYou**$14.96**2 rev2mo ago](https://www.amazon.com/dp/B0GVSMSSQH) [**MULOIUDZ Baseball Sister Shirts for Kid Toddler Girls in My Baseball Sister Era T-Shirt Game Day Tees Short Sleeve Tops 2-8Y(Apricot 6-7Y)**MULOIUDZ**$13.96**7 rev2mo ago](https://www.amazon.com/dp/B0GYZ9Q4DJ) [**NUMYEAN Girls Short Sleeve T Shirts Raglan Tee Tops Baseball Shirts for Girl Fashion Clothes White Red 9-10 Years**NUMYEAN**$7.17**25 rev5mo ago](https://www.amazon.com/dp/B0GGRTVZ53) [**NQIQO Baseball Sister Shirt Im Just Here for The Snacks Tshirt Pink 2-3T**NQIQO**$13.56**21 rev6mo ago](https://www.amazon.com/dp/B0G5PCSBK8) [**NQIQO Baseball Sister Shirt Im Just Here for The Snacks Tshirt Pink 3-4T**NQIQO**$13.42**21 rev6mo ago](https://www.amazon.com/dp/B0G5PD6H7Q)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**MULOIUDZ Baseball Sister Shirts for Kid Toddler Girls in My Baseball Sister Era T-Shirt Game Day Tees Short Sleeve Tops 2-8Y(Apricot 6-7Y)**MULOIUDZ**$13.96**5.0★**▲ 49%**](https://www.amazon.com/dp/B0GYZ9Q4DJ) [**BeWithYou Girls Baseball Shirt Kids Cute Game Day Shirts Coquette Baseball Bow Graphic Tees Preppy Funny Aesthetic Trendy TopWhite 150**BeWithYou**$14.96**5.0★**▲ 49%**](https://www.amazon.com/dp/B0GVSMSSQH) [**Hello Kitty Little Girls French Terry Baseball Jersey Drop Shoulder Athletic V-Neck T-Shirt Cream/Pink 7-8**Hello Kitty**$18.45**4.7★**▲ 49%**](https://www.amazon.com/dp/B0G1PR19LX) [**NUMYEAN Girls Short Sleeve T Shirts Raglan Tee Tops Baseball Shirts for Girl Fashion Clothes White Red 9-10 Years**NUMYEAN**$7.17**4.0★**▲ 48%**](https://www.amazon.com/dp/B0GGRTVZ53) [**FRYAID Toddler Baseball Sister Shirt Baby Girl Baseball Outfit Big Sister Shirt Birthday Girl T-Shirt Summer Cotton Tee Top Red-White**FRYAID**$11.22**4.8★**▲ 45%**](https://www.amazon.com/dp/B0F2FNHD3D)
**~~View all trending →~~**
## **What buyers say about baseball sister shirt**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**28%
*“It fits as expected”*
**Quality-Overall**14%
*“is well made”*
**Soft Feel**9%
*“The material is soft”*
**Color**7%
*“The colors are always so perfect and vibrant too”*
**Comfort-Overall**5%
*“very comfy too”*
**Material Quality**4%
*“The material is lightweight and breathable, making it a good choice for warm weather and active play”*
**Advertised Vs Actual Product**3%
*“It looked same as picture”*
**Design-Overall**3%
*“The design is cute”*
**Value For Money**3%
*“Reasonably priced”*
**Washability**2%
*“The top washed well”*
### **What buyers complain about **
**Size-Overall**15%
*“Sizing inconsistent,”*
**Color**11%
*“not right color”*
**Print Quality**8%
*“Dont know why they print #15 on the shirt”*
**Durability**7%
*“However, several of the rhinestones and beads fell off after one wear”*
**Product Condition**5%
*“Jersey clearly used, and filthy”*
**Advertised Vs Actual Product**3%
*“not even the same”*
**Material Quality**3%
*“heavier weight cotton material”*
**Machine Wash Suitability**2%
*“Unraveled after the first wash”*
**Quality-Overall**2%
*“quality is not the best”*
**Stretchability/Expandability/Elasticity**1%
*“Instead of cheap stretchy material”*
### **Top return reasons **
**Size-Overall**55%
**Length**10%
**Color**5%
**Chest Fit**5%
**Quality-Overall**4%
**Material Quality**3%
**Advertised Vs Actual Product**3%
**Waist Fit**2%
**Transparency**2%
**Value For Money**2%
## **Common questions**
- **Is baseball sister shirt profitable to sell on Amazon United States?**
- The niche generates $9K/yr across 120 tracked products. 1 of 37 products launched in the last 360 days are still selling. 90-day search growth is -3.6%. Flapen's verdict: Skip it (45/100).
- **How competitive is the baseball sister shirt niche?**
- 53 brands and 42 sellers compete. The top 5 products take 20% of clicks and top 5 brands hold 50% of demand.
- **What do buyers complain about in baseball sister shirt?**
- Top complaints mined from reviews: Size-Overall, Color, Print Quality. The return rate is 3.4%.
- **When does demand for baseball sister shirt peak?**
- Demand peaks in Mar–Apr–May; the busiest month runs 17.5× the quietest.
- **What does it cost to enter the baseball sister shirt niche?**
- Listings span $7.17–$29.41; the average listing price is $13.76 (sweet spot $15–$100). The average incumbent carries 88 reviews — the moat a new listing must climb.
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