black onesie
Skip itSoft demand (-16.2% this quarter) — this niche doesn't clear our bar today.
Avg price
Good$13.51avg listing price — sweet spot $15–$100
Returns
Good2.7%return rate — above 5% kills the launch gate
Competition
Good51%top-5 click share — leaders hold, buyers still browse
Brand share
Good74%top-5 brand share — brands hold most of the demand
Price range
Okay$8.98–$20.64cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Bad1.8%search→purchase rate — share of searches ending in a sale
Review moat
Bad9,326.59avg incumbent reviews — the moat a new listing must climb
Market size
Bad$85K$85K/yr · 361K searches
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Growth
Bad-16.2%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, black onesie is a $85K/yr Amazon United States market (361K searches/yr). The top 5 brands hold 74% of demand. Demand peaks in Oct–Nov. Verdict: Skip it — 36/100.
Data updated Jul 8, 2026 · scored weekly · How we score niches
black onesie market data
- Units sold / yr
- 5K–6K
- avg 100–250/product
- Revenue / yr
- $68K–$81K
- units × avg price
- Conversion rate
- 1.8%
- Avg BSR
- #161
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 93%
- Out of stock
- 0.0%
- Avg brand age
- 40 months
- Avg seller age
- 169 days
Competition & brand share
The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.Brands
14 falling
Sellers
21
Top-5 brand share
74%
Top 20: 100%
Top-5 click share
51%
Top 20: 87%
Open market
21%
- 123 Bear30%
- Gerber27%
- Jomixa7%
- Carhartt5%
- GUISBY5%
- ROMPERINBOX4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -16.2% search growth over the last 90 days.Peak months: Oct, Nov · busiest ÷ quietest = 4.8×
Top black onesie search terms
- black onesie baby87K/yr
- black baby clothes31K/yr
- black onesie41K/yr
- black baby onesie32K/yr
- black onesies 0-3 months19K/yr
- black newborn outfit15K/yr
- black onesies11K/yr
- black newborn onesie8K/yr
- black long sleeve onesie baby26K/yr
- baby black onesie10K/yr
Top black onesie 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
123 Bear Baby Cotton Spandex Infant Bodysuits Long Sleeve and Short Sleeve (Black 2-Pack Short Sleeve Newborn)
123 Bear$9.934.8★664 rev
Gerber Baby Boys 5-pack Solid Onesies Bodysuits Shirt Black 0-3 Months US
Gerber$15.724.8★58,053 rev
Gerber Baby Boys 5-pack Solid Onesies Bodysuits Shirt Black 3-6 Months US
Gerber$16.054.8★58,053 rev
Elevens Kingdom Baby Pajamas 3-6 Months Black Cotton Baby Boy Sleeper Sleepers PJs with Mitten Cuffs 2 Way Zipper Baby Boy Clothes Onesie Footies Infant Sleep and Play Black 3-6 Months
Eleven's Kingdom$12.024.4★468 rev
Aablexema Baby Footie Pajamas Zipper - Rayon from Bamboo Infant Footed Pjs with Mittens Sleepwear Jammies(Black Newborn)
Aablexema$13.824.4★1,230 rev
Newest
by launch date
ROMPERINBOX Baby Girl Bodysuit 2 Pack V Neck Ruffle Short Sleeve Ribbed Onsies Summer Baby Girls Clothes (Black/White 0-3 Months)
ROMPERINBOX$18.6015 rev
Jimonda Baby Boy Girl Bubble Romper Solid Color Bodysuit Short Sleeve Cotton T-Shirt Outfits Funny Clothes Summer Tops Black9-12M
Jimonda$13.90319 rev
123 Bear Baby Cotton Spandex Infant Bodysuits Long Sleeve and Short Sleeve (Black 2-Pack Long Sleeve Newborn)
123 Bear$10.04664 rev
Jomixa New Born Romper Baby Bodysuit Jumpsuit 100% Cotton Long Sleeve with Mitten Cuff and Footies for 0-12 Months (Black 3-6 Months)
Jomixa$9.88146 rev
Jomixa New Born Romper Baby Bodysuit Jumpsuit 100% Cotton Long Sleeve with Mitten Cuff and Footies for 0-12 Months (Black 0-3 Months)
Jomixa$9.88146 rev
Trending
90-day click momentumJimonda Baby Boy Girl Bubble Romper Solid Color Bodysuit Short Sleeve Cotton T-Shirt Outfits Funny Clothes Summer Tops Black9-12M
Jimonda$13.904.7★
Laughing Giraffe Baby Blank Short Sleeve Unisex One Piece Bodysuit (6-12 Months Black)
Laughing Giraffe$9.044.9★
Elevens Kingdom Baby Pajamas 3-6 Months Black Cotton Baby Boy Sleeper Sleepers PJs with Mitten Cuffs 2 Way Zipper Baby Boy Clothes Onesie Footies Infant Sleep and Play Black 3-6 Months
Eleven's Kingdom$12.024.4★
KYTE BABY Short Sleeve Unisex Baby Bodysuits Rayon Made From Bamboo Material (18-24 Months Midnight)
KYTE BABY$20.644.7★
Gerber Baby Boys 5-pack Solid Onesies Bodysuits Shirt Black 12 Months US
Gerber$16.074.8★
What buyers say about black onesie
What buyers praise and complain about, mined from review topics.What buyers love
“Great quality”
“Great fit”
“Its lightweight and nice material”
“The material is soft, breathable, and comfortable on my babys skin”
“Great for my baby and Comfortable”
“Nice stretchy material”
“there thick”
“The color and quality seem great,”
“durable”
“No shrinking or stretching either”
What buyers complain about
“Inconsistent sizing”
“Hole”
“These onesies smelled like pure throw up I want a full refund”
“Shrunk”
“Shrunk”
“Shrinks after you wash and dry it”
“Not the best quality”
“One of the onesies is longer than the others”
Top return reasons
Common questions
- Is black onesie profitable to sell on Amazon United States?
- The niche generates $85K/yr across 29 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -16.2%. Flapen's verdict: Skip it (36/100).
- How competitive is the black onesie niche?
- 14 brands and 21 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 74% of demand.
- What do buyers complain about in black onesie?
- Top complaints mined from reviews: Size-Overall, Gap/Hole, Smell. The return rate is 2.7%.
- When does demand for black onesie peak?
- Demand peaks in Oct–Nov; the busiest month runs 4.8× the quietest.
- What does it cost to enter the black onesie niche?
- Listings span $8.98–$20.64; the average listing price is $13.51 (sweet spot $15–$100). The average incumbent carries 9,327 reviews — the moat a new listing must climb.