oversized king duvet
Skip itA deep review moat (26,148 avg reviews) — this niche doesn't clear our bar today.
Avg price
Great$77.90avg listing price — sweet spot $15–$100
Price range
Okay$31.47–$176.71cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Okay3.3%return rate — above 5% kills the launch gate
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Okay60%top-5 click share — leaders hold, buyers still browse
Market size
Okay$163K$163K/yr · 76K searches
Conversion
Okay2.7%search→purchase rate — share of searches ending in a sale
Brand share
Okay88%top-5 brand share — brands hold most of the demand
Growth
Bad-12.5%90-day search growth — must beat 0% to launch
Review moat
Bad26,147.5avg incumbent reviews — the moat a new listing must climb
According to Flapen's Amazon United States niche tracking, oversized king duvet is a $163K/yr Amazon United States market (76K searches/yr). The top 5 brands hold 88% of demand. Demand peaks in Jan–Oct–Nov–Dec. Verdict: Skip it — 37/100.
Data updated Jul 18, 2026 · scored weekly · How we score niches
oversized king duvet market data
- Units sold / yr
- 1K–1K
- avg 0–100/product
- Revenue / yr
- $78K–$97K
- units × avg price
- Conversion rate
- 2.7%
- Avg BSR
- #31
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 94%
- Out of stock
- 8.4%
- Avg brand age
- 46 months
- Avg seller age
- 181 days
Competition & brand share
The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.Brands
10 falling
Sellers
17
Top-5 brand share
88%
Top 20: 100%
Top-5 click share
60%
Top 20: 100%
Open market
8%
- Bedsure54%
- DOWNCOOL18%
- Serta6%
- APSMILE5%
- EASELAND4%
- Utopia Bedding4%
- Open — no brand owns it (4 brands, 8%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -12.5% search growth over the last 90 days.Peak months: Jan, Oct, Nov, Dec · busiest ÷ quietest = 3.3×
Top oversized king duvet search terms
- oversized king duvet48K/yr
- oversized duvet insert10K/yr
- oversize king duvet7K/yr
- duvet oversized king6K/yr
- oversized duvet insert king5K/yr
Top oversized king duvet 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 18 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Bedsure Comforter Duvet Insert - Quilted Comforters Oversized King Size All Season Duvet GentleSoft Down Alternative Bedding with 8 Tabs Gifts for Women/Men White Oversized King 116 x 98 Inches
Bedsure$75.784.7★76,760 rev
DOWNCOOL Comforters Oversize King Size White Duvet Insert Lightweight
DOWNCOOL$37.574.6★19,251 rev
Serta Goose Feathers Down Fiber Comforter Oversize King Duvet Insert 100% Cotton Cover Hotel Luxury Hypoallergenic Comforter All Season Medium Warmth 108 x 98 in White
Serta$84.654.6★557 rev
DOWNCOOL Feather Comforter Oversized King Size 100% Cotton Cover Ultra Soft Fluffy Duvet Insert All Season Luxurious Hotel Bedding Comforters with Corner Tabs White 116x98
DOWNCOOL$78.594.3★3,319 rev
Bedsure Prewashed Oversized King Duvet Cover Cotton-Like Soft Set Linen
Bedsure$37.304.5★986 rev
Newest
by launch date
CozyLux Oversized King Comforter Duvet Insert White All Season Quilted Bed Comforter Box Stitched Down Alternative Duvet with 8 Corner Tabs Gifts for Women Men 116 x 98 Inches (White)
CozyLux$46.4068 rev
Serta Goose Feathers Down Fiber Comforter Oversize King Duvet Insert 100% Cotton Cover Hotel Luxury Hypoallergenic Comforter All Season Medium Warmth 108 x 98 in White
Serta$84.65557 rev
Pacific Coast Goose Feather Down Fiber Comforters King Size Extra Fluffy White Duvet Insert Ultra-Soft Breathable All Season Hotel Luxury Bedding Comforters 8 Corner & Center Loops (106x90)
Pacific Coast$169.76943 rev
Bedsure Cotton Duvet Cover Set - 100% Cotton Waffle Weave Linen Duvet Cover Oversized King Size PureWoven Breathable Bedding Set for All Season 3 Pieces 120x98
Bedsure$102.319,635 rev
DOWNCOOL Feather Comforter Oversized King Size 100% Cotton Cover Ultra Soft Fluffy Duvet Insert All Season Luxurious Hotel Bedding Comforters with Corner Tabs White 116x98
DOWNCOOL$78.593,319 rev
Trending
90-day click momentumCozyLux Oversized King Comforter Duvet Insert White All Season Quilted Bed Comforter Box Stitched Down Alternative Duvet with 8 Corner Tabs Gifts for Women Men 116 x 98 Inches (White)
CozyLux$46.404.8★
Hotel Luxury All Season Feather Down Comforter Oversized King Silky Soft Egyptian Cotton Blend Cover Fluffy Ethically Sourced Feather & Down Fibers Filled Duvet Insert with Ties 120x98 Inch White
Cobnom$110.433.0★
DOWNCOOL Feather Comforter Oversized King Size 100% Cotton Cover Ultra Soft Fluffy Duvet Insert All Season Luxurious Hotel Bedding Comforters with Corner Tabs White 116x98
DOWNCOOL$78.594.3★
Oversized King Comforter 120x98 Extra Large Super King Spring Lightweight Soft Quilted Down-Alternative Duvet Insert Fluffy Breathable Microfiber with 8 Corner Tabs All Season Bedding White
STWIENER$51.284.6★
APSMILE Oversized King Size Down Feather Fibers Comforter All Seasons Duvet Insert with 100% Organic Cotton Fluffy Fill-Power Medium Warm Hotel Comforter Insert (120x98 inches Ivory White)
APSMILE$155.504.3★
What buyers say about oversized king duvet
What buyers praise and complain about, mined from review topics.What buyers love
“Love the comfort”
“Soft and fluffy”
“Comfortable and warm”
“It seems well made”
“a nice lightweight cover”
“Fits well”
“Amazing price”
“It's very cozy, soft, and fluffy”
“As advertised”
“THE COLOR IS GREAT”
What buyers complain about
“Awful quality”
“Not thick as advertised”
“Too small”
“Flat not fluffy”
“Does not last”
“making it uncomfortable to sleep with through the night”
“not warm at all”
“Lumpy once washed”
“Too Loud”
“Too Hot”
Top return reasons
Common questions
- Is oversized king duvet profitable to sell on Amazon United States?
- The niche generates $163K/yr across 18 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -12.5%. Flapen's verdict: Skip it (37/100).
- How competitive is the oversized king duvet niche?
- 10 brands and 17 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 88% of demand.
- What do buyers complain about in oversized king duvet?
- Top complaints mined from reviews: Quality-Overall, Thickness, Size-Overall. The return rate is 3.3%.
- When does demand for oversized king duvet peak?
- Demand peaks in Jan–Oct–Nov–Dec; the busiest month runs 3.3× the quietest.
- What does it cost to enter the oversized king duvet niche?
- Listings span $31.47–$176.71; the average listing price is $77.90 (sweet spot $15–$100). The average incumbent carries 26,148 reviews — the moat a new listing must climb.