boy onesies 6-9 months
Skip itStrong incumbent ratings (4.8★) — this niche doesn't clear our bar today.
Competition
Great21%top-5 click share — an open shelf
Avg price
Great$20.74avg listing price — sweet spot $15–$100
Price range
Great$9.67–$36.69cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Good2.1%return rate — above 5% kills the launch gate
Brand share
Okay82%top-5 brand share — brands hold most of the demand
Conversion
Okay2.1%search→purchase rate — share of searches ending in a sale
Growth
Bad-4.2%90-day search growth — must beat 0% to launch
Market size
Bad$69K$69K/yr · 155K searches
Review moat
Bad19,351.63avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.8★avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, boy onesies 6-9 months is a $69K/yr Amazon United States market (155K searches/yr). The top 5 brands hold 82% of demand. Verdict: Skip it — 44/100.
Data updated Jul 8, 2026 · scored weekly · How we score niches
boy onesies 6-9 months market data
- Units sold / yr
- 3K–3K
- avg 0–100/product
- Revenue / yr
- $52K–$62K
- units × avg price
- Conversion rate
- 2.1%
- Avg BSR
- #101
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 94%
- Out of stock
- 6.1%
- Avg brand age
- 35 months
- Avg seller age
- 171 days
Competition & brand share
Clicks spread well past the top 5 (21% combined) — an open shelf where new products get seen.Brands
27 rising
Sellers
34
Top-5 brand share
82%
Top 20: 98%
Top-5 click share
21%
Top 20: 51%
Open market
14%
- Gerber39%
- Simple Joys by Carter's20%
- Onesies Brand11%
- Unnivoll6%
- Amazon Essentials6%
- Yoofoss4%
- Open — no brand owns it (21 brands, 14%)
Demand & seasonality
Weekly Amazon search volume, last 92 weeks — -4.2% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.2×
Top boy onesies 6-9 months search terms
- 9 month onesies boy12K/yr
- onesie 6-9 months boy11K/yr
- 6-9 month onesies boy11K/yr
- boy onesies 6-9 months11K/yr
- onesies 6-9 months boy9K/yr
- baby clothes 6-9 months9K/yr
- 6-9 month boy onesies9K/yr
- baby boy clothes 6-9 months winter5K/yr
- 6-9 month5K/yr
- 6-9 month clothes8K/yr
Top boy onesies 6-9 months 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
Gerber Baby 8-Pack Short Sleeve Onesies Bodysuits Southwest 6-9 Months
Gerber$25.324.8★56,105 rev
Gerber Baby 8-Pack Short Sleeve Onesies Bodysuits Solid White 6-9 Months
Gerber$16.824.8★56,105 rev
Gerber Baby Boys 4 Pack N Play Footie And Toddler Sleepers Jungle Blue 6-9 Months US
Gerber$26.054.7★52,562 rev
Gerber Baby 5-Pack Solid Onesies Bodysuits White 6-9 Months
Gerber$13.084.8★58,053 rev
Simple Joys by Carters Baby Boys 3-Pack Snap-up Rompers Pants Alligators/stripe/Diggers 6-9 Months
Simple Joys by Carter's$20.214.8★21,726 rev
Newest
by launch dateSimple Joys by Carters Baby Boys 3-Pack Snap-up Rompers Pants Alligators/stripe/Diggers 6-9 Months
Simple Joys by Carter's$20.2121,726 rev
Simple Joys Baby Boys 6-pack short sleeve original bodysuits Shirt Blue/Grey 6-9 Months
Simple Joys by Carter's$18.2166,953 rev
Simple Joys by Carters Unisex Babies Short-Sleeve Bodysuit Pack of 8 Navy Heather/White/Oatmeal 6-9 Months
Simple Joys by Carter's$16.5022,295 rev
Simple Joys by Carters Baby 6-pack Short-sleeve Embellished Bodysuit black/white 6-9 Months
Simple Joys by Carter's$18.4666,953 rev
Simple Joys by Carters Baby 3-pack Rompers Blue Stripe/Turquoise Dino/Grey Navy 6-9 Months
Simple Joys by Carter's$24.3818,852 rev
Trending
90-day click momentum
Unnivoll Baby Bodysuits Rayon From Bamboo 6-9 Months Baby Boys Girls Clothes Short Sleeve Infant Newborn Romper 3 Pack Gradient Brown
Unnivoll$17.074.8★
Unnivoll Baby Bodysuits Rayon From Bamboo 6-9 Months Baby Boys Girls Clothes Short Sleeve Infant Newborn Romper 3 Pack Gradient Blue
Unnivoll$16.324.8★
BIGBIGKISS Baby Bodysuit and Pant Set 10 Pack Cotton Newborn Baby Boy Girl Clothes Outfits
BIGBIGKISS$36.694.7★
Gerber Baby Girls 15 Piece Onesies Bodysuit Multi Size Pack Shirt White 0-3M 3-6M 6-9M US
Gerber$35.354.8★
Amazon Essentials Unisex Toddlers Baby Unisex 6-Pack Sleeveless Bodysuits White 6-9 Months
Amazon Essentials$16.744.8★
What buyers say about boy onesies 6-9 months
What buyers praise and complain about, mined from review topics.What buyers love
“Great fit super easy to take off and on”
“Easy to pair and good quality”
“The material is soft and comfortable”
“Great deal”
“Love the color”
“Cute gift”
“This is very comfortable”
“Good quality material”
“Warm and soft”
“The design is lovely”
What buyers complain about
“Runs very small”
“Cheap material”
“They shrink”
“Very disappointing as I love the colors”
“there was a rip in the seam for 2 of them”
“Cheap”
“It smelled so bad I had to let it air out before washing it”
“the other 2 are a stiff rough material”
“Really big around neck area”
“The green one with the planet is super small and not stretchy”
Top return reasons
Common questions
- Is boy onesies 6-9 months profitable to sell on Amazon United States?
- The niche generates $69K/yr across 107 tracked products. 23 of 36 products launched in the last 360 days are still selling. 90-day search growth is -4.2%. Flapen's verdict: Skip it (44/100).
- How competitive is the boy onesies 6-9 months niche?
- 27 brands and 34 sellers compete. The top 5 products take 21% of clicks and top 5 brands hold 82% of demand.
- What do buyers complain about in boy onesies 6-9 months?
- Top complaints mined from reviews: Size-Overall, Material Quality, Shrinkage Resistance. The return rate is 2.1%.
- When does demand for boy onesies 6-9 months peak?
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- What does it cost to enter the boy onesies 6-9 months niche?
- Listings span $9.67–$36.69; the average listing price is $20.74 (sweet spot $15–$100). The average incumbent carries 19,352 reviews — the moat a new listing must climb.