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.

birthday girl shirt

Skip it

Weak search conversion (0.9%) — this niche doesn't clear our bar today.

Brand share

Great51%

top-5 brand share — no brand owns this niche

Competition

Great32%

top-5 click share — an open shelf

Review moat

Great469.24

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

Okay4.3%

return rate — above 5% kills the launch gate

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Growth

Bad-17.2%

90-day search growth — must beat 0% to launch

Conversion

Bad0.9%

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

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

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.

Peak months: Sep · busiest ÷ quietest = 1.9×

Open Trend

Top birthday girl shirt search terms

birthday girl shirt490K/yr -12.2%0.5% conv.
birthday girl outfit247K/yr -25.7%0.2% conv.
birthday shirt223K/yr -7.0%0.1% conv.
birthday outfits for girls98K/yr -21.6%0.1% conv.
birthday shirt girl98K/yr -23.4%0.5% conv.
girls birthday shirt63K/yr -16.9%0.5% conv.
birthday shirts50K/yr -14.0%0.1% conv.
6th birthday girl outfit40K/yr -10.7%0.3% conv.
girls birthday outfit45K/yr -25.4%0.1% conv.
7th birthday shirt girl49K/yr -16.2%0.3% conv.

All 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.

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

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$11.964.8★3,605 rev

The Childrens Place girls Birthday Graphic Tee T Shirt White Small US

The Children's Place$7.054.8★1,849 rev

Unicorn 5th Birthday Shirt Outfit for Girls 5 Year Old Fifth Birthday Five Tshirt (6 Years Mauve)

Unordinary Toddler$12.944.9★939 rev

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$14.804.7★221 rev

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$28.524.8★542 rev

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$19.1015 rev

4mo ago

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$14.8438 rev

6mo ago

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$15.3963 rev

8mo ago

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$14.0063 rev

1y ago

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$13.9663 rev

1y ago

What buyers say about birthday girl shirt

What buyers praise and complain about, mined from review topics.

What buyers love

Size-Overall30%

“It fits as expected”

Quality-Overall17%

“Great quality shirt”

Advertised Vs Actual Product8%

“Looks exactly as pictured”

Soft Feel6%

“The material feels soft and comfortable, and the embroidery on the shirt is really cute and well done”

Material Quality6%

“Love the material”

Comfort-Overall6%

“is very comfortable”

Color4%

“Beautiful color”

Gifting Purpose2%

“Birthday gift”

Brightness/Shine/Glow2%

“bright”

Shape/Style2%

“Outfit is really cute”

What buyers complain about

Size-Overall43%

“Runs small”

Color8%

“Dots lost their color”

Shrinkage Resistance5%

“so I may never know if it will shrink”

Thickness4%

“Shirt is a little thin”

Material Quality4%

“Not at all what I expected material is clingy”

Quality-Overall3%

“Pretty cheap overall”

Shoulder Fit2%

“both were way too big at the shoulder”

Sleeve Fit1%

“sleeves shorter than appears in photo”

Print Quality1%

“the print came off after washing it the first time”

Value For Money1%

“The price was a little high so I was hesitant”

Top return reasons

Size-Overall63%

Length15%

Material Quality4%

Advertised Vs Actual Product2%

Color2%

Chest Fit2%

Quality-Overall2%

Waist Fit1%