9th birthday shirt girl
Skip itA small market ($31K/yr) — this niche doesn't clear our bar today.
Review moat
Great243.37avg incumbent reviews — the moat a new listing must climb
Competition
Great35%top-5 click share — an open shelf
Avg price
Great$15.16avg listing price — sweet spot $15–$100
Price range
Okay$9.93–$18.91cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Okay82%top-5 brand share — brands hold most of the demand
Conversion
Okay2.3%search→purchase rate — share of searches ending in a sale
Growth
Okay+2.1%90-day search growth — must beat 0% to launch
Returns
Bad5.7%return rate — above 5% kills the launch gate
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Market size
Bad$31K$31K/yr · 88K searches
According to Flapen's Amazon United States niche tracking, 9th birthday shirt girl is a $31K/yr Amazon United States market (88K searches/yr). The top 5 brands hold 82% of demand. Demand peaks in Mar–Sep. Verdict: Skip it — 38/100.
Data updated Jul 20, 2026 · scored weekly · How we score niches
9th birthday shirt girl market data
- Units sold / yr
- 3K–3K
- avg 0–100/product
- Revenue / yr
- $38K–$45K
- units × avg price
- Conversion rate
- 2.3%
- Avg BSR
- #1,573
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 90%
- Out of stock
- 1.0%
- Avg brand age
- 22 months
- Avg seller age
- 171 days
Competition & brand share
Clicks spread well past the top 5 (35% combined) — an open shelf where new products get seen.Brands
16 falling
Sellers
16
Top-5 brand share
82%
Top 20: 100%
Top-5 click share
35%
Top 20: 76%
Open market
15%
- AG AGUU38%
- GLIGLITTR24%
- Unordinary Toddler9%
- CM C&M WODRO6%
- Tstars4%
- Zoemghc4%
- Open — no brand owns it (10 brands, 15%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +2.1% search growth over the last 90 days.Peak months: Mar, Sep · busiest ÷ quietest = 2.0×
Top 9th birthday shirt girl search terms
- 9th birthday shirt30K/yr
- 9 year old birthday shirt14K/yr
- 9 birthday shirt11K/yr
- 9 year old girl birthday shirt6K/yr
- on cloud 9 birthday shirt7K/yr
- birthday shirt 95K/yr
- 9 year old birthday shirt girl8K/yr
- birthday girl outfit 9 years old6K/yr
Top 9th birthday shirt girl 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
AG AGUU On Cloud Nine Birthday Girl Shirts Kids Girls Birthday Outfits Flower 9th T-Shirt Party Tees Tops 9 Years Old(Beige-9th)
AG AGUU$14.754.9★153 rev
GLIGLITTR On Cloud Nine Birthday Girl Shirt 9 Years Rainbow Kids 9th Birthday T-Shirt White
GLIGLITTR$14.724.7★125 rev
9th Birthday Shirt Girls Nine Tshirt Gifts 9 Year Old Girl Gifts 9 yr Birthday Tees (US Age 14 Years 16 Years Purple)
Unordinary Toddler$13.014.8★27 rev
AG AGUU On Cloud Nine Birthday Girl Shirts Kids Girls Birthday Outfits Flower 9th T-Shirt Party Tees Tops 9 Years Old(Black-9th)
AG AGUU$14.754.9★153 rev
GLIGLITTR On Cloud Nine Birthday Girl Shirt 9th Girls Birthday Outfits Rainbow Kids 9 Year Old Tshirt Birthday Party Tee Tops(Black 9years)
GLIGLITTR$14.704.7★125 rev
Newest
by launch date
AG AGUU On Cloud Nine Birthday Girl Shirts 9th Birthday T-Shirt Girls 9 Years Old Tie Dye Outfits Kids B-Day Party Tee Tops(Tie-dye-c-9th)
AG AGUU$14.886 rev
9th Birthday Shirt Girls Nine Tshirt Gifts 9 Year Old Girl Gifts 9 yr Birthday Tees (US Age 14 Years 16 Years Purple)
Unordinary Toddler$13.0127 rev
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$13.9969 rev
GLIGLITTR Birthday Girl Shirt 6th 7th 8th 9th Girls Birthday Tshirt Kids Bday Party Outfit Sequin Glitter Embroidery Tee Tops(White 9Y)
GLIGLITTR$16.39137 rev
AG AGUU On Cloud Nine Birthday Girl Shirts Kids Girls Birthday Outfits Flower 9th T-Shirt Party Tees Tops 9 Years Old(Light Pink-9th)
AG AGUU$14.77153 rev
Trending
90-day click momentum9th Birthday Shirt Girls Nine Tshirt Gifts 9 Year Old Girl Gifts 9 yr Birthday Tees (US Age 14 Years 16 Years Purple)
Unordinary Toddler$13.014.8★
AG AGUU On Cloud Nine Birthday Girl Shirts 9th Birthday T-Shirt Girls 9 Years Old Tie Dye Outfits Kids B-Day Party Tee Tops(Tie-dye-c-9th)
AG AGUU$14.885.0★
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$13.994.8★
AG AGUU Birthday Boy Shirts 9th Birthday T-Shirt Kids Toddler Baby 9Y Boys Birthday Tees Party Outfits Nine Year Old Tops(Blue-9th)
AG AGUU$14.654.6★
9th Birthday Shirt Girl On Cloud Nine Graphic Tee 9 Year Old Birthday Party T-Shirt Girl Summer Short Sleeve Top (Grey 9 Years)
CM C&M WODRO$14.894.8★
What buyers say about 9th birthday shirt girl
What buyers praise and complain about, mined from review topics.What buyers love
“Perfect fit great for the birthday”
“Good quality”
“Material is soft, comfortable”
“Bright, soft, and really well made, with a smooth cotton blend fabric that feels gentle and comfy for all day wear”
“it was even better than expected”
“Beautiful color”
“A good value for the money”
“Beautiful, bright and just as pictured”
“holds up in wash”
“comfortable”
What buyers complain about
“Too big”
“Not the best”
“Shirt is a little thin”
“it is poorly printed pattern and color with blurry off center design, and the cheap fabric is completely sheer and see through”
“The picture I attached isn't the best as I told my daughter to take a selfie”
“so I may never know if it will shrink”
Top return reasons
Common questions
- Is 9th birthday shirt girl profitable to sell on Amazon United States?
- The niche generates $31K/yr across 41 tracked products. 0 of 6 products launched in the last 360 days are still selling. 90-day search growth is +2.1%. Flapen's verdict: Skip it (38/100).
- How competitive is the 9th birthday shirt girl niche?
- 16 brands and 16 sellers compete. The top 5 products take 35% of clicks and top 5 brands hold 82% of demand.
- What do buyers complain about in 9th birthday shirt girl?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Thickness. The return rate is 5.7% — above our launch gate.
- When does demand for 9th birthday shirt girl peak?
- Demand peaks in Mar–Sep; the busiest month runs 2.0× the quietest.
- What does it cost to enter the 9th birthday shirt girl niche?
- Listings span $9.93–$18.91; the average listing price is $15.16 (sweet spot $15–$100). The average incumbent carries 243 reviews — the moat a new listing must climb.