8th birthday shirt for girls
Skip itA small market ($37K/yr) — this niche doesn't clear our bar today.
Competition
Great27%top-5 click share — an open shelf
Brand share
Great52%top-5 brand share — no brand owns this niche
Review moat
Great421.22avg incumbent reviews — the moat a new listing must climb
Avg price
Good$14.16avg listing price — sweet spot $15–$100
Price range
Good$5.96–$29.71cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Okay3.6%return rate — above 5% kills the launch gate
Conversion
Okay2.4%search→purchase rate — share of searches ending in a sale
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Growth
Bad-29.5%90-day search growth — must beat 0% to launch
Market size
Bad$37K$37K/yr · 109K searches
According to Flapen's Amazon United States niche tracking, 8th birthday shirt for girls is a $37K/yr Amazon United States market (109K searches/yr). The top 5 brands hold 52% of demand. Demand peaks in Sep. Verdict: Skip it — 44/100.
Data updated Jul 20, 2026 · scored weekly · How we score niches
8th birthday shirt for girls market data
- Units sold / yr
- 3K–4K
- avg 0–100/product
- Revenue / yr
- $42K–$57K
- units × avg price
- Conversion rate
- 2.4%
- Avg BSR
- #5,445
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 88%
- Out of stock
- 9.2%
- Avg brand age
- 21 months
- Avg seller age
- 209 days
Competition & brand share
Clicks spread well past the top 5 (27% combined) — an open shelf where new products get seen.Brands
39 falling
Sellers
40
Top-5 brand share
52%
Top 20: 88%
Top-5 click share
27%
Top 20: 58%
Open market
44%
- MULOIUDZ20%
- GLIGLITTR10%
- BOUTIKOME9%
- Zoemghc6%
- Unordinary Toddler6%
- Goengmo5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -29.5% search growth over the last 90 days.Peak months: Sep · busiest ÷ quietest = 1.9×
Top 8th birthday shirt for girls search terms
- 8th birthday shirt for girls51K/yr
- birthday girl shirt 822K/yr
- girls 8th birthday shirt11K/yr
- 8 year old girl birthday shirt9K/yr
- birthday shirt girl 87K/yr
- birthday girl outfit 8 years old9K/yr
Top 8th birthday shirt for girls 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
MULOIUDZ Eight Birthday Girl Shirts 8th Girls Birthday Outfits Kid Bow B-Day T-Shirt 8 Years Old Party Tees Gift Tops(Pink 8th)
MULOIUDZ$14.884.7★38 rev
GLIGLITTR Birthday Girl Shirt 6th 7th 8th 9th Girls Birthday Tshirt Kids Bday Party Outfit Sequin Glitter Embroidery Tee Tops(Pink 8Y)
GLIGLITTR$17.324.8★137 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$13.994.8★69 rev
MULOIUDZ Chapter 8 Bow Birthday Girl Shirts 8th Girls Birthday Outfits Kid B-Day T-Shirt Eight Years Old Tee Party Gift Tops(Pink 8th)
MULOIUDZ$15.154.8★11 rev
Birthday Girl Shirt Kids Birthday Party Tee Tops Tie Dye Happy T-Shirt 8 7th Shirt Girl with Letter Beads
JZyangmei$12.864.6★280 rev
Newest
by launch dateMULOIUDZ Chapter 8 Bow Birthday Girl Shirts 8th Girls Birthday Outfits Kid B-Day T-Shirt Eight Years Old Tee Party Gift Tops(Pink 8th)
MULOIUDZ$15.1511 rev
8 Year Old Girl Birthday Outfit 67 Meme Girls 8th Birthday T-Shirt
8th Birthday Gifts for Girl I Survived 6 7$16.007 rev
MULOIUDZ Eight Birthday Girl Shirts 8th Girls Birthday Outfits Kid Bow B-Day T-Shirt 8 Years Old Party Tees Gift Tops(Pink 8th)
MULOIUDZ$14.8838 rev
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$14.8540 rev
MULOIUDZ Eight Birthday Girl Shirts 8th Girls Birthday Outfits Kid Bow B-Day T-Shirt 8 Years Old Party Tees Gift Tops(Hot Pink 8th)
MULOIUDZ$14.8138 rev
Trending
90-day click momentumMULOIUDZ Chapter 8 Bow Birthday Girl Shirts 8th Girls Birthday Outfits Kid B-Day T-Shirt Eight Years Old Tee Party Gift Tops(Pink 8th)
MULOIUDZ$15.154.8★
BOUTIKOME Birthday Girl Shirt Toddler Kid Girls Tie Dye T-Shirt Sequins Crown Birthday Outfits Tees B-Day Gifts Party Tops(Pink-1 8-9Y)
BOUTIKOME$14.794.6★
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$14.854.9★
MULOIUDZ Eight Birthday Girl Shirts 8th Girls Birthday Outfits Kid Bow B-Day T-Shirt 8 Years Old Party Tees Gift Tops(Pink 8th)
MULOIUDZ$14.884.7★
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$13.964.8★
What buyers say about 8th birthday shirt for girls
What buyers praise and complain about, mined from review topics.What buyers love
“not too big and not tight either”
“Great quality shirt”
“Its perfect exactly as pictured”
“the colors are bright”
“The material is soft and comfortable,”
“Material is soft, comfortable”
“is very comfortable”
“Good gift”
“The design is bright, fun, and perfect for making a birthday girl feel extra special on her big day”
“Definitely worth it”
What buyers complain about
“Runs very small”
“although I wish the material was a little thicker”
“colors more muted then picture, ran long”
“Cheap material”
“Low Quality”
“Not screen printed like picture makes it seem”
“dont breathe much”
“The hem was a bit sloppy”
Top return reasons
Common questions
- Is 8th birthday shirt for girls profitable to sell on Amazon United States?
- The niche generates $37K/yr across 73 tracked products. 4 of 28 products launched in the last 360 days are still selling. 90-day search growth is -29.5%. Flapen's verdict: Skip it (44/100).
- How competitive is the 8th birthday shirt for girls niche?
- 39 brands and 40 sellers compete. The top 5 products take 27% of clicks and top 5 brands hold 52% of demand.
- What do buyers complain about in 8th birthday shirt for girls?
- Top complaints mined from reviews: Size-Overall, Thickness, Color. The return rate is 3.6%.
- When does demand for 8th birthday shirt for girls peak?
- Demand peaks in Sep; the busiest month runs 1.9× the quietest.
- What does it cost to enter the 8th birthday shirt for girls niche?
- Listings span $5.96–$29.71; the average listing price is $14.16 (sweet spot $15–$100). The average incumbent carries 421 reviews — the moat a new listing must climb.