12x18 window
Worth a lookShows sweet-spot pricing room ($28.75–$81.19), but a small market ($25K/yr) keeps it on the watch list.
Price range
Incredible$28.75–$81.19cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great$50.51avg listing price — sweet spot $15–$100
Review moat
Great232.36avg incumbent reviews — the moat a new listing must climb
Returns
Great1.8%return rate — above 5% kills the launch gate
Conversion
Good6.5%search→purchase rate — share of searches ending in a sale
Competition
Good49%top-5 click share — leaders hold, buyers still browse
Brand share
Good71%top-5 brand share — brands hold most of the demand
Growth
Okay+1.7%90-day search growth — must beat 0% to launch
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Market size
Bad$25K$25K/yr · 8K searches
According to Flapen's Amazon United States niche tracking, 12x18 window is a $25K/yr Amazon United States market (8K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in Aug–Sep. Verdict: Worth a look — 51/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
12x18 window market data
- Units sold / yr
- 500–750
- avg 0–100/product
- Revenue / yr
- $25K–$38K
- units × avg price
- Conversion rate
- 6.5%
- Avg BSR
- #117
- Page quality
- 0%
- Prime
- 82%
- Sponsored
- 91%
- Out of stock
- 39.2%
- Avg brand age
- 27 months
- Avg seller age
- 272 days
Competition & brand share
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.Brands
15 rising
Sellers
17
Top-5 brand share
71%
Top 20: 100%
Top-5 click share
49%
Top 20: 97%
Open market
29%
- NeatiEase17%
- Apple Outdoor Supply17%
- Melkus12%
- JONRIOX9%
- COLORPAPA8%
- Yuzzy8%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +1.7% search growth over the last 90 days.Peak months: Aug, Sep · busiest ÷ quietest = 3.9×
Top 12x18 window 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 22 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Melkus 2 Pack Shed Windows 12x18 Flush Mount Household Windows with Thicker Tempered Glass and Fiberglass Screen Sliding Windows for Chicken Coop Shed Garage Playhouse Barn Greenhouse White
Melkus$54.634.7★253 rev
NeatiEase 2 Pack Shed Window 12 x 18 Flush Mount Window with Tempered Glass and Fiberglass Screen for Shed Chicken Coop Playhouse Household Garage
NeatiEase$53.194.6★652 rev
Apple Outdoor Supply 12x18 Shed Window Flush Mount Sliding Window with Tempered Glass & Screen Brown 1-Pack
Apple Outdoor Supply$28.754.7★310 rev
NOTASA Shed Windows 2 Pack Chicken Coop Windows 12 x 18 Black
NOTASA$56.134.6★200 rev
COLORPAPA 2 Pack Shed Windows 12 x 18 Small Sliding Windows Flush Mount Windows with Tempered Glass and Fiberglass Screen for Shed Chicken Coop Playhouse Household Garage Barns (White)
COLORPAPA$54.844.6★414 rev
Newest
by launch date
2 Pack 12 x 18 Shed Windows with White Frame Flush Mount Small Window with PC Screen for Shed for Shed Chicken Coop Household Playhouse Garage
LotFun$51.6416 rev
NOTASA Shed Windows 2 Pack Chicken Coop Windows 12 x 18 Black
NOTASA$56.13200 rev
2 Pack Shed Windows 12x18 Flush Mount Sliding Windows with Tempered Glass & Fiberglass Screen Small Window with 41 Screws for Chicken Coop Playhouse Basement Bathroom Garage Barns (White)
Cieex$54.8520 rev
Shed Window 12x18 - Vertical Slider with Tempered Glass & Bug Screen (Black)
Outdoor Hardware Supply$38.993 rev
1 Pack Black Shed Window 12 x 18 Flush Mount Window with Tempered Glass and Fiberglass Screen for Chicken Coop Sheds Barns Playhouse
Asstinous$40.20129 rev
Trending
90-day click momentum
JONRIOX 12 W x 18 H Shed Window Sliding Window Aluminum White Flush Mount with Tempered Glass and Stainless Steel Screen Playhouse Window Chicken Coop Window Household Window.(White 2 Pack)
JONRIOX$81.194.8★
Apple Outdoor Supply 12x18 Shed Window Flush Mount Sliding Window with Tempered Glass & Screen White 1-Pack
Apple Outdoor Supply$38.214.7★
2 Pack 12 x 18 Shed Windows with White Frame Flush Mount Small Window with PC Screen for Shed for Shed Chicken Coop Household Playhouse Garage
LotFun$51.644.3★
Shed Window 12x18 - Vertical Slider with Tempered Glass & Bug Screen (Black)
Outdoor Hardware Supply$38.995.0★
PRO FLEX 2 Pack Shed Window 12 x 18 - Ultra Thick White Aluminum Flush Mount with Tempered Glass and Screen - Shed Windows with Vertical Slider and Screws for Chicken Coop Sheds Barns Playhouses
PRO FLEX$59.524.8★
What buyers say about 12x18 window
What buyers praise and complain about, mined from review topics.What buyers love
“Zero complaints”
“Good for the money”
“Basic DYI install”
“Perfect fit”
“Better than I expected”
“Windows appear to be solid and well made”
“And super easy to use”
“Easy install no leaks”
“Smooth beautiful addition”
“Well built little windows”
What buyers complain about
“Small”
“was clearly marked fragile”
“the other is jammed”
“Set - One works one does not”
“It took longer to remove the stuff than it did to install the windows”
“not tape and sealant”
“It took longer to remove the stuff than it did to install the windows”
“Check prices as they have gone up since I purchased”
Top return reasons
Common questions
- Is 12x18 window profitable to sell on Amazon United States?
- The niche generates $25K/yr across 22 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +1.7%. Flapen's verdict: Worth a look (51/100).
- How competitive is the 12x18 window niche?
- 15 brands and 17 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 71% of demand.
- What do buyers complain about in 12x18 window?
- Top complaints mined from reviews: Size-Overall, Strength, Jamming/Clogging. The return rate is 1.8%.
- When does demand for 12x18 window peak?
- Demand peaks in Aug–Sep; the busiest month runs 3.9× the quietest.
- What does it cost to enter the 12x18 window niche?
- Listings span $28.75–$81.19; the average listing price is $50.51 (sweet spot $15–$100). The average incumbent carries 232 reviews — the moat a new listing must climb.