1/2 birthday boy
Worth a lookShows a thin review moat (113 avg reviews), but high returns (7.2%) keeps it on the watch list.
Review moat
Great113.34avg incumbent reviews — the moat a new listing must climb
Competition
Great30%top-5 click share — an open shelf
Brand share
Great57%top-5 brand share — no brand owns this niche
Avg price
Great$15.20avg listing price — sweet spot $15–$100
Market size
Good$584K$584K/yr · 1.6M searches
Price range
Good$5.88–$27.55cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Okay2.4%search→purchase rate — share of searches ending in a sale
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-5.9%90-day search growth — must beat 0% to launch
Returns
Bad7.2%return rate — above 5% kills the launch gate
According to Flapen's Amazon United States niche tracking, 1/2 birthday boy is a $584K/yr Amazon United States market (1.6M searches/yr). The top 5 brands hold 57% of demand. Demand peaks in May–Jun. Verdict: Worth a look — 52/100.
Data updated Jul 8, 2026 · scored weekly · How we score niches
1/2 birthday boy market data
- Units sold / yr
- 40K–50K
- avg 250–500/product
- Revenue / yr
- $608K–$760K
- units × avg price
- Conversion rate
- 2.4%
- Avg BSR
- #517
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 95%
- Out of stock
- 3.2%
- Avg brand age
- 29 months
- Avg seller age
- 160 days
Competition & brand share
Clicks spread well past the top 5 (30% combined) — an open shelf where new products get seen.Brands
34 falling
Sellers
39
Top-5 brand share
57%
Top 20: 87%
Top-5 click share
30%
Top 20: 64%
Open market
39%
- Honganda27%
- Lamuusaa11%
- Bagilaanoe9%
- Thorn Tree5%
- Ereniko5%
- Agvgaza4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -5.9% search growth over the last 90 days.Peak months: May, Jun · busiest ÷ quietest = 2.5×
Top 1/2 birthday boy search terms
- 1/2 birthday boy335K/yr
- half birthday decorations210K/yr
- 6 months birthday decorations122K/yr
- half birthday100K/yr
- half way to one baby boy121K/yr
- 1/2 birthday hat121K/yr
- half birthday outfit baby boy86K/yr
- 1/2 birthday83K/yr
- half birthday hat76K/yr
- 1/2 birthday boy outfit52K/yr
Top 1/2 birthday boy 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
Honganda Baby Boy 1/2 Birthday Outfit Sleeveless Corduroy Overalls Half Way to One Cake Smash Romper for Half Birthday Party (Beige 6-12 Months)
Honganda$14.804.7★83 rev
Honganda Baby Boy 1/2 Birthday Outfit Sleeveless Corduroy Overalls Half Way to One Cake Smash Romper for Half Birthday Party (1/2 Birthday Blue 6-12 Months)
Honganda$13.604.7★83 rev
Lamuusaa Half Birthday Outfit Baby Boy Girl Half Way to One Balloon Romper Sleeveless Backless Bodysuit Cake Smash Outfit (Blue 6-12 Months)
Lamuusaa$14.664.6★12 rev
Honganda Baby Boy 1/2 Birthday Outfit Sleeveless Corduroy Overalls Half Way to One Cake Smash Romper for Half Birthday Party (Blue 6-12 Months)
Honganda$14.854.7★83 rev
1/2 Birthday Boy Half Birthday Decorations - White Green Half Way to One Banner Cake Topper Tassel Wood Bead High Chair Banner Hat for Boys 6 Months Birthday Decorations Party Supplies
THAWAY$19.084.6★266 rev
Newest
by launch dateLamuusaa Half Birthday Outfit Baby Boy Girl Half Way to One Balloon Romper Sleeveless Backless Bodysuit Cake Smash Outfit (Blue 6-12 Months)
Lamuusaa$14.6612 rev
Honganda Baby Boy 1/2 Birthday Outfit Sleeveless Corduroy Overalls Half Way to One Cake Smash Romper for Half Birthday Party (1/2 Birthday Blue 6-12 Months)
Honganda$13.6083 rev
Bagilaanoe Half Birthday Outfit Baby Boy Half Way to ONE Baseball Sleeveless Romper Jumpsuit One Year Old Clothes (Blue 6-12 Months)
Bagilaanoe$14.713 rev
Lamuusaa Half Birthday Outfit Baby Boy Half Way to One Romper Plaid Bodysuit One Piece Jumpsuit Summer Cake Smash Outfit (Blue 6-12 Months)
Lamuusaa$14.007 rev
Lamuusaa Half Birthday Outfit Baby Boy Half Way to One Romper Plaid Bodysuit One Piece Jumpsuit Summer Cake Smash Outfit (Sandy Beige 6-12 Months)
Lamuusaa$14.117 rev
Trending
90-day click momentumLamuusaa Half Birthday Outfit Baby Boy Girl Half Way to One Balloon Romper Sleeveless Backless Bodysuit Cake Smash Outfit (Blue 6-12 Months)
Lamuusaa$14.664.6★
Honganda Baby Boy 1/2 Birthday Outfit Sleeveless Corduroy Overalls Half Way to One Cake Smash Romper for Half Birthday Party (1/2 Birthday Blue 6-12 Months)
Honganda$13.604.7★
Bagilaanoe Half Birthday Outfit Baby Boy Half Way to ONE Baseball Sleeveless Romper Jumpsuit One Year Old Clothes (Blue 6-12 Months)
Bagilaanoe$14.715.0★
Thorn Tree Baby Half Birthday Outfit Sleeveless Embroidery Romper Rib Bodysuit Onesie Infant Cake Smash Outfit (Khaki 6-12 Months)
Thorn Tree$13.425.0★
Lamuusaa Half Birthday Outfit Baby Boy Half Way to One Romper Plaid Bodysuit One Piece Jumpsuit Summer Cake Smash Outfit (Blue 6-12 Months)
Lamuusaa$14.003.5★
What buyers say about 1/2 birthday boy
What buyers praise and complain about, mined from review topics.What buyers love
“good quality and easy to arrange”
“As described”
“fit as expected”
“Good value for money”
“The colors are super cute”
“Super cute and well crafted”
“Easy to assemble”
“Good quality material”
“It's very durable”
“comfortable”
What buyers complain about
“too small”
“I have a small baby so the straps were a riny bit long on him”
“Garbage”
“two different colors from hat and banner”
“Does not float when filled with helium”
“Did not receive everything as described”
“The beads were not knotted in so they kept falling down as I was manipulating it to put on the high chair”
“came a little bent”
“The only con is that the balloons smelled strongly of latex”
“Received damaged and needed it for the next day”
Top return reasons
Common questions
- Is 1/2 birthday boy profitable to sell on Amazon United States?
- The niche generates $584K/yr across 56 tracked products. 13 of 31 products launched in the last 360 days are still selling. 90-day search growth is -5.9%. Flapen's verdict: Worth a look (52/100).
- How competitive is the 1/2 birthday boy niche?
- 34 brands and 39 sellers compete. The top 5 products take 30% of clicks and top 5 brands hold 57% of demand.
- What do buyers complain about in 1/2 birthday boy?
- Top complaints mined from reviews: Size-Overall, Strap/String Quality, Quality-Overall. The return rate is 7.2% — above our launch gate.
- When does demand for 1/2 birthday boy peak?
- Demand peaks in May–Jun; the busiest month runs 2.5× the quietest.
- What does it cost to enter the 1/2 birthday boy niche?
- Listings span $5.88–$27.55; the average listing price is $15.20 (sweet spot $15–$100). The average incumbent carries 113 reviews — the moat a new listing must climb.