kingsize mattress
Skip itPrices mostly outside the sweet spot ($96.59–$320.37) — this niche doesn't clear our bar today.
Returns
Great1.3%return rate — above 5% kills the launch gate
Brand share
Great52%top-5 brand share — no brand owns this niche
Competition
Great38%top-5 click share — an open shelf
Review moat
Good636.5avg incumbent reviews — the moat a new listing must climb
Avg price
Good£143.31avg listing price — sweet spot $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Market size
Bad£98K£98K/yr · 53K searches
Growth
Bad-16.4%90-day search growth — must beat 0% to launch
Conversion
Bad1.3%search→purchase rate — share of searches ending in a sale
Price range
Bad£96.59–£320.37cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, kingsize mattress is a £98K/yr Amazon United Kingdom market (53K searches/yr). The top 5 brands hold 52% of demand. Demand peaks in Oct–Nov. Verdict: Skip it — 48/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
kingsize mattress market data
- Units sold / yr
- 500–750
- avg 0–100/product
- Revenue / yr
- £72K–£107K
- units × avg price
- Conversion rate
- 1.3%
- Avg BSR
- #93
- Page quality
- 0%
- Prime
- 96%
- Sponsored
- 98%
- Out of stock
- 16.7%
- Avg brand age
- 32 months
- Avg seller age
- 205 days
Competition & brand share
Clicks spread well past the top 5 (38% combined) — an open shelf where new products get seen.Brands
29 falling
Sellers
43
Top-5 brand share
52%
Top 20: 92%
Top-5 click share
38%
Top 20: 71%
Open market
43%
- dosleeps21%
- Uliyati11%
- TeQsli10%
- NOFFA6%
- slily5%
- SEZMOONSI5%
Demand & seasonality
Weekly Amazon search volume, last 102 weeks — -16.4% search growth over the last 90 days.Peak months: Oct, Nov · busiest ÷ quietest = 2.6×
Top kingsize mattress search terms
- kingsize memory foam mattress5K/yr
- hybrid mattress king3K/yr
- king size orthopaedic mattress memory foam4K/yr
- king size extra firm mattress5K/yr
- amazon king size mattress6K/yr
- king size memory foam mattresses5K/yr
- simba mattress king size uk5K/yr
- king size hybrid mattress medium firm4K/yr
- silent night king size mattresses3K/yr
- medium king size hybrid mattress3K/yr
Top kingsize mattress 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
dosleeps King Size Mattress 5FT | 10.6 Extra Thick Memory Foam & Pocket Sprung | 9-Zone Orthopedic Support Medium Firm Motion Isolation Edge Support 150x200x27cm
dosleeps£173.164.4★2,598 rev
Uliyati King Size Mattresses 5FT 20CM Gel Memory Foam Mattress Breathable for Cool Sleep & Pressure Relief - Medium 150x200x20CM CertiPUR-US Certified
Uliyati£108.164.6★452 rev
dosleeps King Size Mattress 5FT | 10 Memory Foam & Pocket Sprung | 9-Zone Orthopedic Support Breathable Cover Motion Isolation Edge Support Medium Firm 150x200x25cm
dosleeps£178.034.5★3,412 rev
NOFFA Orthopedic King Mattress | 12 King-Size Hybrid Mattresses | 7 Zone Orthopedic Mattresses Include Memory Foam & Pocket Sprungs 150x200x30cm
NOFFA£201.994.9★106 rev
Matoresu Hybrid Firm Kingsize Mattress (150x200cm) Extra Firm Support for Back Pain Side Sleepers & Elderly 25cm 7-Zone Pocket Sprung for Pressure Relief Motion Isolation & OEKO-TEX Certified
Matoresu£139.834.4★368 rev
Newest
by launch date
SANA SLEEP 5FT King Mattress 9 Zone Orthopedic King Mattress Comfortable Home Pocket Spring Mattress Breathable Anti-Slip Design for Undisturbed Sleep 150x200x25 cm
SANA SLEEP£122.7735 rev
SANA SLEEP 5FT King Mattress 11 Zone Orthopedic King Mattress Pocket Spring Mattress Motion Isolation Pressure Relief Supportive & Comfortable 150x200x27 cm
SANA SLEEP£120.4550 rev
Simba Simbatex Cool mattress 23 cm king 150 × 200 cm
Simba£320.37134 rev
SEZMOONSI King Size Mattress Gel Memory Foam King Mattresses 5FT Hybrid Pocket Spring Kingsize Matress Orthopedic King Bed Mattresses with Breathable Soft Fabric 150x200x27cm
SEZMOONSI£114.12121 rev
NineLan Orthopaedic King Size Mattress 5FT for Back Pain Relief 10.6 Inch Hybrid 7-Zone Pocket Sprung Mattress with Cooling Gel Memory Foam & Breathable Knitted Cover Medium Firm 150x200x27cm
NineLan£162.8461 rev
Trending
90-day click momentumSANA SLEEP 5FT King Mattress 11 Zone Orthopedic King Mattress Pocket Spring Mattress Motion Isolation Pressure Relief Supportive & Comfortable 150x200x27 cm
SANA SLEEP£120.454.5★
NineLan Orthopaedic King Size Mattress 5FT for Back Pain Relief 10.6 Inch Hybrid 7-Zone Pocket Sprung Mattress with Cooling Gel Memory Foam & Breathable Knitted Cover Medium Firm 150x200x27cm
NineLan£162.844.7★
SANA SLEEP 5FT King Mattress 9 Zone Orthopedic King Mattress Comfortable Home Pocket Spring Mattress Breathable Anti-Slip Design for Undisturbed Sleep 150x200x25 cm
SANA SLEEP£122.774.4★
TeQsli King Size Mattress 5FT 10.6 Inch Gel Memory Foam Pocket Sprung Mattress Edge Support & Motion Isolation Spring Hybrid King Mattresses - Medium Firm Feel 150x200x27 cm
TeQsli£108.534.5★
Matoresu Hybrid Firm Kingsize Mattress (150x200cm) Extra Firm Support for Back Pain Side Sleepers & Elderly 25cm 7-Zone Pocket Sprung for Pressure Relief Motion Isolation & OEKO-TEX Certified
Matoresu£139.834.4★
What buyers say about kingsize mattress
What buyers praise and complain about, mined from review topics.What buyers love
“Comfortable and supportive”
“Money well spent”
“Excellent quality mattress”
“Good firm mattress”
“Its soft”
“very thick mattress”
“The mattress does not sink when sleeping on it”
“fits the bed perfectly”
“Well put together”
“It provides great support while still feeling comfortable and cushioned”
What buyers complain about
“It does not provide the support or comfort that was advertised”
“Debatable quality so far”
“To hard for a mattress”
“Not as described”
“Fault after a few months use”
“I would sink down into it”
“I was expecting something much larger”
“Not worth for price”
“was so heavy”
“Not memory foam”
Top return reasons
Common questions
- Is kingsize mattress profitable to sell on Amazon United Kingdom?
- The niche generates £98K/yr across 50 tracked products. 20 of 21 products launched in the last 360 days are still selling. 90-day search growth is -16.4%. Flapen's verdict: Skip it (48/100).
- How competitive is the kingsize mattress niche?
- 29 brands and 43 sellers compete. The top 5 products take 38% of clicks and top 5 brands hold 52% of demand.
- What do buyers complain about in kingsize mattress?
- Top complaints mined from reviews: Comfort-Overall, Quality-Overall, Hard Feel. The return rate is 1.3%.
- When does demand for kingsize mattress peak?
- Demand peaks in Oct–Nov; the busiest month runs 2.6× the quietest.
- What does it cost to enter the kingsize mattress niche?
- Listings span £96.59–£320.37; the average listing price is £143.31 (sweet spot $15–$100). The average incumbent carries 637 reviews — the moat a new listing must climb.