porthole window
Worth a lookShows a thin review moat (101 avg reviews), but a small market ($48K/yr) keeps it on the watch list.
Review moat
Great100.73avg incumbent reviews — the moat a new listing must climb
Avg price
Great$53.93avg listing price — sweet spot $15–$100
Competition
Great31%top-5 click share — an open shelf
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Brand share
Good73%top-5 brand share — brands hold most of the demand
Price range
Good$6.16–$166.41cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+13.4%90-day search growth — must beat 0% to launch
Returns
Okay4.2%return rate — above 5% kills the launch gate
Conversion
Bad1.0%search→purchase rate — share of searches ending in a sale
Market size
Bad$48K$48K/yr · 87K searches
According to Flapen's Amazon United States niche tracking, porthole window is a $48K/yr Amazon United States market (87K searches/yr). The top 5 brands hold 73% of demand. Verdict: Worth a look — 50/100.
Data updated Aug 2, 2026 · scored weekly · How we score niches
porthole window market data
- Units sold / yr
- 750–1K
- avg 0–100/product
- Revenue / yr
- $40K–$54K
- units × avg price
- Conversion rate
- 1.0%
- Avg BSR
- #2,185
- Page quality
- 0%
- Prime
- 94%
- Sponsored
- 83%
- Out of stock
- 17.5%
- Avg brand age
- 42 months
- Avg seller age
- 182 days
Competition & brand share
Clicks spread well past the top 5 (31% combined) — an open shelf where new products get seen.Brands
23 rising
Sellers
47
Top-5 brand share
73%
Top 20: 98%
Top-5 click share
31%
Top 20: 69%
Open market
23%
- Nagina International29%
- THE ANTIQUE HOUSE17%
- Amarine Made13%
- inanosa9%
- The Metal Magician5%
- Creative Co-Op4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +13.4% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.2×
Top porthole window search terms
- porthole mirror20K/yr
- porthole window18K/yr
- porthole15K/yr
- boat window9K/yr
- porthole picture frame8K/yr
- port hole wall decor4K/yr
- port hole4K/yr
- port holes window5K/yr
- porthole windows3K/yr
Top porthole 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Antique Transparent Porthole 9 Inches Round Window Clear Glass Nautical Window Ship Porthole
THE ANTIQUE HOUSE$39.524.0★34 rev
Nagina International Powder Coated Premium Nautical Aluminum Pirates Ships Porthole Window | Exclusive Wall Decor Accent (8 Inches Antique Brass)
Nagina International$32.623.7★11 rev
The Metal Magician 12inch Nautical Decor Porthole Wall Mirror Polished Brass Mirror for Home Pirate Decor Shipwrecked Victorian
The Metal Magician$72.094.7★38 rev
Nagina International 12 Nautical Nickel Plated Premium Ships Porthole Mirror | Maritime Wall Decor Plane Mirror
Nagina International$27.944.4★140 rev
Antique Brass 9 Inch Mirror Porthole Wall Hanging Nautical Home Decorative Gift
THE ANTIQUE HOUSE$38.514.2★26 rev
Newest
by launch date
Viozakanry 6 Styles Large Nautical Porthole Cutouts 11 Inches Double Printed Cabin Scenery Nautical Accents Anchor Sailboat Lighthouse Beach Lifebuoy Seagull Decor for Bulletin Board Party Supplies
Viozakanry$12.5721 rev
Oil Rubbed Antique Bronze Finish Vintage Style Functional Porthole Window | Stylish Home & Wall Mounting Decor | Wall & Door Fixture (Transparent Window Glass) (12 Inches)
Nagina International$41.831 rev
inanosa 10 Inch Antique Brass Porthole Mirror Boat Frame Port Hole Decor Vintage Nautical Ship Mirror for Coastal Wall & Antique Decor
inanosa$47.2460 rev
inanosa 8 Inch Brass Porthole Window Small Round Nautical Wall Window Antique Brass Ship Porthole for Coastal & Vintage Decor
inanosa$33.803 rev
The Metal Magician 12inch Nautical Decor Porthole Wall Mirror Polished Brass Mirror for Home Pirate Decor Shipwrecked Victorian
The Metal Magician$72.0938 rev
Trending
90-day click momentuminanosa 20 Inch Nautical Wall Window Large Brass Porthole Window Nautical Wall Art Ship Decor Antique Brass Round Porthole with Clear Glass for Coastal & Sailing Dcor
inanosa$124.382.5★
SEAFLO Round Porthole Window with ABS Plastic & Tempered Glass for Boat Yacht Marine Applications (White 10.5)
SEAFLO$43.975.0★
Viozakanry 6 Styles Large Nautical Porthole Cutouts 11 Inches Double Printed Cabin Scenery Nautical Accents Anchor Sailboat Lighthouse Beach Lifebuoy Seagull Decor for Bulletin Board Party Supplies
Viozakanry$12.574.3★
Nagina International Powder Coated Premium Nautical Aluminum Pirates Ships Porthole Window | Exclusive Wall Decor Accent (8 Inches Antique Brass)
Nagina International$32.623.7★
inanosa 8 Inch Brass Porthole Window Small Round Nautical Wall Window Antique Brass Ship Porthole for Coastal & Vintage Decor
inanosa$33.802.5★
What buyers say about porthole window
What buyers praise and complain about, mined from review topics.What buyers love
“Very good quality”
“Good value for a one-sided porthole”
“Fun Addition for Dogs — Easy Install and Clear Visibility”
“My dog loves it”
“Sturdy”
“Great gift”
“the unit is attractive”
“Super easy to install”
“Ties the room together”
“Help me find my room easy”
What buyers complain about
“I just couldnt find the right size”
“So don't advertise as such”
“But no instructions”
“Missing parts”
“Item was missing the nuts required to secure bolts”
Top return reasons
Common questions
- Is porthole window profitable to sell on Amazon United States?
- The niche generates $48K/yr across 52 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +13.4%. Flapen's verdict: Worth a look (50/100).
- How competitive is the porthole window niche?
- 23 brands and 47 sellers compete. The top 5 products take 31% of clicks and top 5 brands hold 73% of demand.
- What do buyers complain about in porthole window?
- Top complaints mined from reviews: Size-Overall, Advertised Vs Actual Product, Instructions/User Manual/Troubleshooting. The return rate is 4.2%.
- When does demand for porthole window peak?
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- What does it cost to enter the porthole window niche?
- Listings span $6.16–$166.41; the average listing price is $53.93 (sweet spot $15–$100). The average incumbent carries 101 reviews — the moat a new listing must climb.