---
title: "Birthday Girl Shirt — $234K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/birthday-girl-shirt"
last_updated: "2026-08-09T16:54:13.684Z"
locale: en
meta:
description: "Niche score 47/100 · $234K/yr market · 1.7M searches/yr · $15.46 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $234K/yr market · 1.7M searches/yr · $15.46 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Birthday Girl Shirt — $234K/yr Amazon US Niche (2026) - Flapen"
---
# **birthday girl shirt**
**Skip it**
Weak search conversion (0.9%) — this niche doesn't clear our bar today.
Market size 44Growth 16Conversion 11Competition 83Returns 33Price range 65Avg price 76Brand share 84Review moat 77Quality gap 17
**Brand share**
**Great****51%**
top-5 brand share — no brand owns this niche
**Competition**
**Great****32%**
top-5 click share — an open shelf
**Review moat**
**Great****469.24**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Great****$15.46**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$7.05–$29.70**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Okay****$234K**
$234K/yr · 1.7M searches
**Returns**
**Okay****4.3%**
return rate — above 5% kills the launch gate
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-17.2%**
90-day search growth — must beat 0% to launch
**Conversion**
**Bad****0.9%**
search→purchase rate — share of searches ending in a sale
According to Flapen's Amazon United States niche tracking, birthday girl shirt is a $234K/yr Amazon United States market (1.7M searches/yr). The top 5 brands hold 51% of demand. Demand peaks in Sep. Verdict: Skip it — 47/100.
Data updated Jul 8, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **birthday girl shirt market data**
- **Units sold / yr**
- **20K–25K**
- avg 250–500/product
- **Revenue / yr**
- **$309K–$387K**
- units × avg price
- **Conversion rate**
- **0.9%**
- **Avg BSR**
- **#760**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **96%**
- **Out of stock**
- **0.3%**
- **Avg brand age**
- **27 months**
- **Avg seller age**
- **175 days**
## **Competition & brand share**
Clicks spread well past the top 5 (32% combined) — an open shelf where new products get seen.
**Brands**
**33 **▼falling
**Sellers**
**38**
**Top-5 brand share**
**51%**
Top 20: 88%
**Top-5 click share**
**32%**
Top 20: 67%
**Open market**
**45%**
- Unordinary Toddler28% - BOUTIKOME8% - The Children's Place7% - Zoemghc4% - NUMYEAN4% - SAYOO4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -17.2% search growth over the last 90 days.
35K25KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/birthday-girl-shirt/trend)
## **Top birthday girl shirt search terms**
- **birthday girl shirt**490K/yr-12.2%0.5% conv. - **birthday girl outfit**247K/yr-25.7%0.2% conv. - **birthday shirt**223K/yr-7.0%0.1% conv. - **birthday outfits for girls**98K/yr-21.6%0.1% conv. - **birthday shirt girl**98K/yr-23.4%0.5% conv. - **girls birthday shirt**63K/yr-16.9%0.5% conv. - **birthday shirts**50K/yr-14.0%0.1% conv. - **6th birthday girl outfit**40K/yr-10.7%0.3% conv. - **girls birthday outfit**45K/yr-25.4%0.1% conv. - **7th birthday shirt girl**49K/yr-16.2%0.3% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/birthday-girl-shirt/search-terms)
## **Top birthday girl 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%4%$9K8%$19K12%$28K16%$38K101001K10K 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**Birthday Girl Shirt Toddler T-Shirt Kid Birthday Party Outfit Tee Gift for Girls 1st 2nd 3rd 4th 5th 6th 7th 8th Tops (White on Mauve 12 Months)**Unordinary Toddler**$11.96**4.8★3,605 rev](https://www.amazon.com/dp/B08HZ6PK11) [2**The Childrens Place girls Birthday Graphic Tee T Shirt White Small US**The Children's Place**$7.05**4.8★1,849 rev](https://www.amazon.com/dp/B08HM9K17V) [3**Unicorn 5th Birthday Shirt Outfit for Girls 5 Year Old Fifth Birthday Five Tshirt (6 Years Mauve)**Unordinary Toddler**$12.94**4.9★939 rev](https://www.amazon.com/dp/B09TXD81WY) [4**BOUTIKOME Birthday Girl Shirts Toddler Kid Girls Tie Dye T-Shirt Birthday Outfits Summer Tees B-Day Gifts Party Tops 1-10Y(Purple 6-7Y)**BOUTIKOME**$14.80**4.7★221 rev](https://www.amazon.com/dp/B0F5PRLMQ6) [5**Tutu and Sian Unicorn Birthday Outfit for Girls - Shirt Tutu Skirt Dress Birthday Girl Crown Hair Bow & Satin Sash (Unicorn 4Y 4-5 Years)**Tutu and Sian**$28.52**4.8★542 rev](https://www.amazon.com/dp/B0D116XQR6)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Lamuusaa Toddler Baby Girl Birthday Outfit Birthday Girl Embroidery Shirt T-shirt Layered Ruffle Skirt Summer Clothes (White 4-5T)**Lamuusaa**$19.10**15 rev4mo ago](https://www.amazon.com/dp/B0GRV68C15) [**MULOIUDZ Bow Birthday Girl Shirts Kid Toddler Girls B-Day T-Shirt Birthday Outfits Gifts Party Tees Short Sleeve Tops 1-8Y(Pink 7-8Y)**MULOIUDZ**$14.84**38 rev6mo ago](https://www.amazon.com/dp/B0G9R69HK8) [**Socutebabe First 2nd 3rd 4th 5th Birthday Outfit Girl B Day Jumpsuit Toddler Halter Romper Bell Bottoms Outfits For Girls (B Day Girl Donut Pink 2-3T)**Socutebabe**$15.39**63 rev8mo ago](https://www.amazon.com/dp/B0FZ8T4PP5) [**Zoemghc Its My Birthday Girl Shirt 4th 5th 6th 7th 8th 9th 10th 11th 12th Graphic Tee for Kids Party Cute Girls Tshirts Tees(White 140)**Zoemghc**$14.00**63 rev1y ago](https://www.amazon.com/dp/B0F6NCTV5D) [**Zoemghc Its My Birthday Girl Shirt 4th 5th 6th 7th 8th 9th 10th 11th 12th Graphic Tee for Kids Party Cute Girls Tshirts Tees(White 150)**Zoemghc**$13.96**63 rev1y ago](https://www.amazon.com/dp/B0F6NDNTS3)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Lamuusaa Toddler Baby Girl Birthday Outfit Birthday Girl Embroidery Shirt T-shirt Layered Ruffle Skirt Summer Clothes (White 4-5T)**Lamuusaa**$19.10**5.0★**▲ 36%**](https://www.amazon.com/dp/B0GRV68C15) [**SAYOO Toddler Birthday Girl Outfit Birthday Girl Letter Embroidery Shirt Top Mesh Tutu Donut Skirt Princess Party Skirt Set (B Pink 5-6T)**SAYOO**$16.57**4.7★**▲ 35%**](https://www.amazon.com/dp/B0DS2HYYHF) [**SAYOO Toddler Birthday Girl Outfit Birthday Girl Letter Embroidery Shirt Top Mesh Tutu Donut Skirt Princess Party Skirt Set (A Pink 3-4T)**SAYOO**$17.86**4.7★**▲ 34%**](https://www.amazon.com/dp/B0DP9YJ4Q5) [**Zoemghc Its My Birthday Girl Shirt 4th 5th 6th 7th 8th 9th 10th 11th 12th Graphic Tee for Kids Party Cute Girls Tshirts Tees(White 150)**Zoemghc**$13.96**4.8★**▲ 33%**](https://www.amazon.com/dp/B0F6NDNTS3) [**WZTYYDS Baby Girl First Birthday Outfit In My One Year Old Era Top Short Sleeve 1st Birthday Shirt + Casual Shorts Set (Pink 12-18 Months)**WZTYYDS**$14.02**4.7★**▲ 29%**](https://www.amazon.com/dp/B0DRNMQM9V)
**~~View all trending →~~**
## **What buyers say about birthday girl shirt**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**30%
*“It fits as expected”*
**Quality-Overall**17%
*“Great quality shirt”*
**Advertised Vs Actual Product**8%
*“Looks exactly as pictured”*
**Soft Feel**6%
*“The material feels soft and comfortable, and the embroidery on the shirt is really cute and well done”*
**Material Quality**6%
*“Love the material”*
**Comfort-Overall**6%
*“is very comfortable”*
**Color**4%
*“Beautiful color”*
**Gifting Purpose**2%
*“Birthday gift”*
**Brightness/Shine/Glow**2%
*“bright”*
**Shape/Style**2%
*“Outfit is really cute”*
### **What buyers complain about **
**Size-Overall**43%
*“Runs small”*
**Color**8%
*“Dots lost their color”*
**Shrinkage Resistance**5%
*“so I may never know if it will shrink”*
**Thickness**4%
*“Shirt is a little thin”*
**Material Quality**4%
*“Not at all what I expected material is clingy”*
**Quality-Overall**3%
*“Pretty cheap overall”*
**Shoulder Fit**2%
*“both were way too big at the shoulder”*
**Sleeve Fit**1%
*“sleeves shorter than appears in photo”*
**Print Quality**1%
*“the print came off after washing it the first time”*
**Value For Money**1%
*“The price was a little high so I was hesitant”*
### **Top return reasons **
**Size-Overall**63%
**Length**15%
**Material Quality**4%
**Advertised Vs Actual Product**2%
**Color**2%
**Chest Fit**2%
**Quality-Overall**2%
**Waist Fit**1%
**Sleeve Fit**1%
**Value For Money**1%
## **Common questions**
- **Is birthday girl shirt profitable to sell on Amazon United States?**
- The niche generates $234K/yr across 55 tracked products. 0 of 14 products launched in the last 360 days are still selling. 90-day search growth is -17.2%. Flapen's verdict: Skip it (47/100).
- **How competitive is the birthday girl shirt niche?**
- 33 brands and 38 sellers compete. The top 5 products take 32% of clicks and top 5 brands hold 51% of demand.
- **What do buyers complain about in birthday girl shirt?**
- Top complaints mined from reviews: Size-Overall, Color, Shrinkage Resistance. The return rate is 4.3%.
- **When does demand for birthday girl shirt peak?**
- Demand peaks in Sep; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the birthday girl shirt niche?**
- Listings span $7.05–$29.70; the average listing price is $15.46 (sweet spot $15–$100). The average incumbent carries 469 reviews — the moat a new listing must climb.
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