---
title: "Kingsize Mattress — £98K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/kingsize-mattress"
last_updated: "2026-08-01T04:02:33.447Z"
locale: en
meta:
description: "Niche score 48/100 · £98K/yr market · 53K searches/yr · £143.31 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · £98K/yr market · 53K searches/yr · £143.31 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Kingsize Mattress — £98K/yr Amazon UK Niche (2026) - Flapen"
---
# **kingsize mattress**
**Skip it**
Prices mostly outside the sweet spot ($96.59–$320.37) — this niche doesn't clear our bar today.
Market size 24Growth 17Conversion 16Competition 77Returns 90Price range 2Avg price 61Brand share 83Review moat 72Quality gap 52
**Returns**
**Great****1.3%**
return rate — above 5% kills the launch gate
**Brand share**
**Great****52%**
top-5 brand share — no brand owns this niche
**Competition**
**Great****38%**
top-5 click share — an open shelf
**Review moat**
**Good****636.5**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Good****£143.31**
avg listing price — sweet spot $15–$100
**Quality gap**
**Good****4.4★**
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**
**Bad****1.3%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Bad****£96.59–£320.37**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Signals**[** High Price**](https://flapen.com/research/niches?market=uk&signal=high_price "Avg price > $50")
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 ~~](https://flapen.com/research/methodology)
## **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.
4K3KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25 seasonDecMarJunAugNovMarMay
Peak months: Oct, Nov · busiest ÷ quietest = 2.6×
[**Open Trend **](https://flapen.com/research/uk/home-garden/kingsize-mattress/trend)
## **Top kingsize mattress search terms**
- **kingsize memory foam mattress**5K/yr+20.6%1.2% conv. - **hybrid mattress king**3K/yr+21.6%0.6% conv. - **king size orthopaedic mattress memory foam**4K/yr-36.8%1.2% conv. - **king size extra firm mattress**5K/yr-30.5%1.2% conv. - **amazon king size mattress**6K/yr-12.3%0.7% conv. - **king size memory foam mattresses**5K/yr-41.2%0.6% conv. - **simba mattress king size uk**5K/yr-13.2%0.1% conv. - **king size hybrid mattress medium firm**4K/yr+5.7%0.4% conv. - **silent night king size mattresses**3K/yr-4.4%0.4% conv. - **medium king size hybrid mattress**3K/yr-35.4%1.4% conv. [**All search terms **](https://flapen.com/research/uk/home-garden/kingsize-mattress/search-terms)
## **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.
0%4%£4K8%£8K12%£12K16%£16K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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**£173.16**4.4★2,598 rev](https://www.amazon.co.uk/dp/B0FYMWDJ9C) [2**Uliyati King Size Mattresses 5FT 20CM Gel Memory Foam Mattress Breathable for Cool Sleep & Pressure Relief - Medium 150x200x20CM CertiPUR-US Certified**Uliyati**£108.16**4.6★452 rev](https://www.amazon.co.uk/dp/B0DK51FNTV) [3**dosleeps King Size Mattress 5FT | 10 Memory Foam & Pocket Sprung | 9-Zone Orthopedic Support Breathable Cover Motion Isolation Edge Support Medium Firm 150x200x25cm**dosleeps**£178.03**4.5★3,412 rev](https://www.amazon.co.uk/dp/B0FM329WPT) [4**NOFFA Orthopedic King Mattress | 12 King-Size Hybrid Mattresses | 7 Zone Orthopedic Mattresses Include Memory Foam & Pocket Sprungs 150x200x30cm**NOFFA**£201.99**4.9★106 rev](https://www.amazon.co.uk/dp/B0FYCD6BR5) [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**£139.83**4.4★368 rev](https://www.amazon.co.uk/dp/B0G7XDCC8F)
**~~View all top sellers →~~**
### **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**£122.77**35 rev4mo ago](https://www.amazon.co.uk/dp/B0GSK1G6G2) [**SANA SLEEP 5FT King Mattress 11 Zone Orthopedic King Mattress Pocket Spring Mattress Motion Isolation Pressure Relief Supportive & Comfortable 150x200x27 cm**SANA SLEEP**£120.45**50 rev4mo ago](https://www.amazon.co.uk/dp/B0GSK28B2Z) [**Simba Simbatex Cool mattress 23 cm king 150 × 200 cm**Simba**£320.37**134 rev4mo ago](https://www.amazon.co.uk/dp/B0GQYDYGTH) [**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**£114.12**121 rev5mo ago](https://www.amazon.co.uk/dp/B0GQGR8DZ5) [**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**£162.84**61 rev6mo ago](https://www.amazon.co.uk/dp/B0GJSF5991)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**SANA SLEEP 5FT King Mattress 11 Zone Orthopedic King Mattress Pocket Spring Mattress Motion Isolation Pressure Relief Supportive & Comfortable 150x200x27 cm**SANA SLEEP**£120.45**4.5★**▲ 224%**](https://www.amazon.co.uk/dp/B0GSK28B2Z) [**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**£162.84**4.7★**▲ 224%**](https://www.amazon.co.uk/dp/B0GJSF5991) [**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**£122.77**4.4★**▲ 183%**](https://www.amazon.co.uk/dp/B0GSK1G6G2) [**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**£108.53**4.5★**▲ 155%**](https://www.amazon.co.uk/dp/B0GH6B9KDX) [**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**£139.83**4.4★**▲ 134%**](https://www.amazon.co.uk/dp/B0G7XDCC8F)
**~~View all trending →~~**
## **What buyers say about kingsize mattress**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Comfort-Overall**35%
*“Comfortable and supportive”*
**Value For Money**15%
*“Money well spent”*
**Quality-Overall**15%
*“Excellent quality mattress”*
**Foam**12%
*“Good firm mattress”*
**Soft Feel**5%
*“Its soft”*
**Thickness**2%
*“very thick mattress”*
**Sags/Sinks**2%
*“The mattress does not sink when sleeping on it”*
**Size-Overall**1%
*“fits the bed perfectly”*
**Assembly/Installation**1%
*“Well put together”*
**Cushion**1%
*“It provides great support while still feeling comfortable and cushioned”*
### **What buyers complain about **
**Comfort-Overall**10%
*“It does not provide the support or comfort that was advertised”*
**Quality-Overall**10%
*“Debatable quality so far”*
**Hard Feel**6%
*“To hard for a mattress”*
**Advertised Vs Actual Product**5%
*“Not as described”*
**Durability**5%
*“Fault after a few months use”*
**Sags/Sinks**5%
*“I would sink down into it”*
**Size-Overall**5%
*“I was expecting something much larger”*
**Value For Money**5%
*“Not worth for price”*
**Weight Heavy**4%
*“was so heavy”*
**Foam**4%
*“Not memory foam”*
### **Top return reasons **
**Size-Overall**25%
**Comfort-Overall**22%
**Quality-Overall**11%
**Soft Feel**7%
**Advertised Vs Actual Product**6%
**Hard Feel**5%
**Cushion**2%
**Flexibility**2%
**Defective Material/Parts**2%
**Functionality-Overall**2%
## **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.
## **Related niches in Home & Garden**
- 79 [**mole repellent**](https://flapen.com/research/uk/home-garden/mole-repellent)£163K/yr+91.4%**Worth a look**- 80 [**sun lounger**](https://flapen.com/research/uk/home-garden/sun-lounger)£2.5M/yr+299.9%**Launch it**- 80 [**fly repellent fan**](https://flapen.com/research/uk/home-garden/fly-repellent-fan)£302K/yr>1,000%**Worth a look**- 80 [**ice maker**](https://flapen.com/research/uk/home-garden/ice-maker)£2.9M/yr+371.4%**Launch it**- 80 [**parasol base**](https://flapen.com/research/uk/home-garden/parasol-base)£1.1M/yr+904.4%**Launch it**- 80 [**air conditioner**](https://flapen.com/research/uk/home-garden/air-conditioner)£39.3M/yr>1,000%**Launch it**[**All Home & Garden niches **](https://flapen.com/research/uk/home-garden)