boys long underwear size 10-12
Skip itSoft demand (-76.6% this quarter) — this niche doesn't clear our bar today.
Avg price
Great$20.78avg listing price — sweet spot $15–$100
Price range
Great$12.12–$32.24cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Good43%top-5 click share — leaders hold, buyers still browse
Brand share
Good63%top-5 brand share — brands hold most of the demand
Review moat
Good1,113.89avg incumbent reviews — the moat a new listing must climb
Conversion
Good4.5%search→purchase rate — share of searches ending in a sale
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Returns
Bad6.9%return rate — above 5% kills the launch gate
Market size
Bad$47K$47K/yr · 51K searches
Growth
Bad-76.6%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, boys long underwear size 10-12 is a $47K/yr Amazon United States market (51K searches/yr). The top 5 brands hold 63% of demand. Demand peaks in Jan–Feb–Oct–Nov–Dec. Verdict: Skip it — 40/100.
Data updated Jul 8, 2026 · scored weekly · How we score niches
boys long underwear size 10-12 market data
- Units sold / yr
- 2K–2K
- avg 0–100/product
- Revenue / yr
- $31K–$42K
- units × avg price
- Conversion rate
- 4.5%
- Avg BSR
- #13
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 89%
- Out of stock
- 6.3%
- Avg brand age
- 44 months
- Avg seller age
- 136 days
Competition & brand share
The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them.Brands
20 falling
Sellers
24
Top-5 brand share
63%
Top 20: 100%
Top-5 click share
43%
Top 20: 80%
Open market
31%
- Spyder30%
- TELALEO10%
- Runhit8%
- Rolimaka8%
- Ewedoos7%
- Cuddl Duds6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -76.6% search growth over the last 90 days.Peak months: Jan, Feb, Oct, Nov, Dec · busiest ÷ quietest = 14.7×
Top boys long underwear size 10-12 search terms
- youth thermal base layer12K/yr
- boys long underwear size 10-127K/yr
- boys long underwear size 14-165K/yr
- kids long underwear boys3K/yr
- base layer boys4K/yr
- 4t thermals for boys7K/yr
- 5t thermals for boys6K/yr
- boys long johns size 10-123K/yr
- boys long johns size 14-163K/yr
Top boys long underwear size 10-12 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
Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Black
Spyder$20.914.7★208 rev
Runhit Thermal Underwear for Kids Long Johns Ultra Soft Long Sleeve Shirts Sets Skiing Base Layer Fleece Lined Pants Suit Black M
Runhit$12.864.7★632 rev
Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Heather Grey
Spyder$20.494.7★208 rev
TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set M
TELALEO$18.554.8★2,926 rev
Ewedoos Thermal Underwear Set for Kids Thermals Top and Bottom Set Boys Long Johns Base Layer Thermal Set Black
Ewedoos$15.914.8★517 rev
Newest
by launch date
HXP Boys Compression Thermal Base Layer Set Athletic Youth Fleece Lined Long Sleeve Sports Tops Leggings for Kids Black M
HXP$12.1285 rev
Zando Boys Thermal Underwear Set - Kids Thermals Top and Bottom Winter Warm Kids Long Johns 4T Fleece Lined Compression Shirt Leggings Thermal Base Layer for Boys Girls Cold Weather 2 Set Black 5T
Zando$22.8885 rev
Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Black
Spyder$20.91208 rev
Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Heather Grey
Spyder$20.49208 rev
Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 8-10 Black
Spyder$23.03208 rev
Trending
90-day click momentum
BAMBOO COOL Boys Underwear Moisture-Wicking Brethable Boxer Briefs Soft Lightweight Tag-Free with Fly Pouch 6-Pack
BAMBOO COOL$32.244.8★
Runhit Thermal Underwear for Kids Long Johns Ultra Soft Long Sleeve Shirts Sets Skiing Base Layer Fleece Lined Pants Suit Black M
Runhit$12.864.7★
HXP Boys Compression Thermal Base Layer Set Athletic Youth Fleece Lined Long Sleeve Sports Tops Leggings for Kids Black M
HXP$12.124.7★
Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Black
Spyder$20.914.7★
G Gradual Youth Boys Compression Thermal Shirt Long Sleeve Fleece Undershirt for Boy Football Baseball Soccer Base Layer(Black XS)
G Gradual$16.204.8★
What buyers say about boys long underwear size 10-12
What buyers praise and complain about, mined from review topics.What buyers love
“Fit great”
“Keep warm”
“Very comfortable”
“Excellent quality, perfect fit, delivered just in time”
“Soft and comfortable”
“Affordable long underwear for kids”
“Durable, good quality”
“The material was comfortable”
“Nice stretch too”
“The moisture-wicking feature works great for an active boy”
What buyers complain about
“Size is 2 sizes tighter than it shouldve been”
“Disappointing Quality for Kids' Thermal Set”
“Cheap material”
“The material isnt too thick”
“And while the waist fits the length is way too short”
“Very long”
“it was sorta long on the sleeves I had to fold them”
“smells chemically out of package”
“the set hasnt stretched out”
“Just a little thin”
Top return reasons
Common questions
- Is boys long underwear size 10-12 profitable to sell on Amazon United States?
- The niche generates $47K/yr across 38 tracked products. 0 of 6 products launched in the last 360 days are still selling. 90-day search growth is -76.6%. Flapen's verdict: Skip it (40/100).
- How competitive is the boys long underwear size 10-12 niche?
- 20 brands and 24 sellers compete. The top 5 products take 43% of clicks and top 5 brands hold 63% of demand.
- What do buyers complain about in boys long underwear size 10-12?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Material Quality. The return rate is 6.9% — above our launch gate.
- When does demand for boys long underwear size 10-12 peak?
- Demand peaks in Jan–Feb–Oct–Nov–Dec; the busiest month runs 14.7× the quietest.
- What does it cost to enter the boys long underwear size 10-12 niche?
- Listings span $12.12–$32.24; the average listing price is $20.78 (sweet spot $15–$100). The average incumbent carries 1,114 reviews — the moat a new listing must climb.