---
title: "Mattress Cover King Size Bed — £52K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/mattress-cover-king-size-bed"
last_updated: "2026-08-01T01:33:29.080Z"
locale: en
meta:
description: "Niche score 48/100 · £52K/yr market · 55K searches/yr · £12.56 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · £52K/yr market · 55K searches/yr · £12.56 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Mattress Cover King Size Bed — £52K/yr Amazon UK Niche (2026) - Flapen"
---
# **mattress cover king size bed**
**Skip it**
A small market ($52K/yr) — this niche doesn't clear our bar today.
Market size 13Growth 19Conversion 77Competition 61Returns 95Price range 48Avg price 55Brand share 62Review moat 20Quality gap 47
**Returns**
**Incredible****0.9%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****7.6%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Good****68%**
top-5 brand share — brands hold most of the demand
**Competition**
**Good****49%**
top-5 click share — leaders hold, buyers still browse
**Avg price**
**Good****£12.56**
avg listing price — sweet spot $15–$100
**Price range**
**Okay****£6.80–£22.61**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****13,707.28**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-11.5%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****£52K**
£52K/yr · 55K searches
According to Flapen's Amazon United Kingdom niche tracking, mattress cover king size bed is a £52K/yr Amazon United Kingdom market (55K searches/yr). The top 5 brands hold 68% of demand. Verdict: Skip it — 48/100.
Data updated Jul 28, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **mattress cover king size bed market data**
- **Units sold / yr**
- **4K–5K**
- avg 100–250/product
- **Revenue / yr**
- **£50K–£63K**
- units × avg price
- **Conversion rate**
- **7.6%**
- **Avg BSR**
- **#38**
- **Page quality**
- **0%**
- **Prime**
- **72%**
- **Sponsored**
- **97%**
- **Out of stock**
- **4.8%**
- **Avg brand age**
- **44 months**
- **Avg seller age**
- **192 days**
## **Competition & brand share**
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**24 **▼falling
**Sellers**
**33**
**Top-5 brand share**
**68%**
Top 20: 98%
**Top-5 click share**
**49%**
Top 20: 86%
**Open market**
**28%**
- CAROLINE SHATUIK26% - MOONLIGHT2001515% - IMFAA12% - Utopia Bedding11% - Salt Valley4% - PlushDeluxe4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -11.5% search growth over the last 90 days.
2K1KSpike '24 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/uk/home-garden/mattress-cover-king-size-bed/trend)
## **Top mattress cover king size bed search terms**
- **king size mattress cover**25K/yr-11.4%5.4% conv. - **mattress cover king size bed**23K/yr-9.4%5.3% conv. - **bed protector king size**4K/yr-24.7%4.9% conv. - **mattress protector king size bed**3K/yr-12.4%5.4% conv. [**All search terms **](https://flapen.com/research/uk/home-garden/mattress-cover-king-size-bed/search-terms)
## **Top mattress cover king size bed 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%£2K8%£4K12%£6K16%£8K101001K10K100K1.0M 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**Caroline Shatuik King Size Mattress Protector fitted Quilted Extra Deep 40cm Stretch Skirt Anti Allergy Mattress Cover (152 x 200) Not-Waterproof**CAROLINE SHATUIK**£10.38**4.5★7,499 rev](https://www.amazon.co.uk/dp/B08Z1R13VS) [2**IMFAA Quilted King Mattress Protector & Mattress Topper Soft Breathable Quilted Pad Extra Deep 40cm Fitted Stretch Skirt Anti-Allergy Noiseless Bed Cover Machine Washable (152x200+40) Cm**IMFAA**£8.76**4.5★15,783 rev](https://www.amazon.co.uk/dp/B07T1DVCM2) [3**Moonlight Bedding King Size Fitted Sheets 40 Cm Extra Deep Pocket Grey Bed Sheets 16 inch Ultra Soft Bottom Sheet Brushed Microfiber Breathable Shrinkage and Fade Resistant**MOONLIGHT20015**£7.78**4.5★4,738 rev](https://www.amazon.co.uk/dp/B0C43DMSXL) [4**Caroline Shatuik Waterproof Mattress Protector King |40cm Extra Deep Fitted King Size Waterproof Bed Protector Topper | Non Noisy & Breathable Mattress Cover King Size Bed(152 X 200 +40CM)**CAROLINE SHATUIK**£9.89**4.5★11,349 rev](https://www.amazon.co.uk/dp/B09TTZ7G2W) [5**Caroline Shatuik Bed Bug Mattress Protector Anti Allergy Fully Zipped Waterproof Mattress Encasement with Zip dust mite cover King size (152 x 200+30cm)**CAROLINE SHATUIK**£14.15**4.5★2,387 rev](https://www.amazon.co.uk/dp/B08TVHD3MQ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Imperial Rooms King Size Mattress Protector Soft & Breathable Mattress Cover Extra Deep 40cm Easy to Fit bed Cover (152x200+40cm)**IR Imperial Rooms**£9.80**851 rev1mo ago](https://www.amazon.co.uk/dp/B0H4QPH6WK) [**Dreamzie King Size Mattress Cover for Moving Mattress Storage Bag Opaque Plastic Tear Resistant with Zip - King Size**Dreamzie**£11.58**206 rev6mo ago](https://www.amazon.co.uk/dp/B0GK288TK8) [**BEDLORE Waterproof Mattress Protector King Size Brushed Microfiber with Upgraded TPU Layer Extra Deep Pocket Hypoallergenic Breathable Noiseless Oeko-tex Mattresses Cover (Gray)**BEDLORE**£20.89**951 rev7mo ago](https://www.amazon.co.uk/dp/B0FLQ1C34W) [**Sylvanora King Size Mattress Protector 30cm Deep White 150 x 200cm**Sylvanora**£15.19**63 rev8mo ago](https://www.amazon.co.uk/dp/B0FL7DXYLL) [**Salt Valley Quilted King Size Mattress Protector Extra Deep 30cm Fitted Skirt Anti-Allergenic & Machine Washable Microfiber Mattress Cover (White 152x200 cm)**Salt Valley**£17.70**152 rev11mo ago](https://www.amazon.co.uk/dp/B0FLVR53JY)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Imperial Rooms King Size Mattress Protector Soft & Breathable Mattress Cover Extra Deep 40cm Easy to Fit bed Cover (152x200+40cm)**IR Imperial Rooms**£9.80**4.2★**▲ 307%**](https://www.amazon.co.uk/dp/B0H4QPH6WK) [**Dreamzie King Size Mattress Cover for Moving Mattress Storage Bag Opaque Plastic Tear Resistant with Zip - King Size**Dreamzie**£11.58**4.3★**▲ 305%**](https://www.amazon.co.uk/dp/B0GK288TK8) [**Utopia Bedding Waterproof Mattress Encasement Super King Size (180 x 200 x 30 cm) Zippered Mattress Protector Cover Bed Bug & Dust Mite Proof White**Utopia Bedding**£10.48**4.6★**▲ 226%**](https://www.amazon.co.uk/dp/B0DQY9KJY4) [**PlushDeluxe Premium Bamboo Mattress Protector Waterproof Hypoallergenic & Ultra Soft Breathable Bed Mattress Cover & Protection -Free PVC Phthalate (UK King Size) White**PlushDeluxe**£22.61**4.5★**▲ 177%**](https://www.amazon.co.uk/dp/B07HC2WHS1) [**Utopia Bedding Waterproof Strap Mattress Protector Super King 180 x 200 cm White Fits Up to 30cm Deep Mattresses Premium Terry Super King Mattress Protector 4 Side Elastic Strap Mattress Cover**Utopia Bedding**£6.80**4.3★**▲ 120%**](https://www.amazon.co.uk/dp/B07SXC52WS)
**~~View all trending →~~**
## **What buyers say about mattress cover king size bed**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**26%
*“EXCELLENT QUALITY”*
**Size-Overall**21%
*“Easy fit”*
**Value For Money**11%
*“Cheap price”*
**Comfort-Overall**6%
*“So comfortable”*
**Advertised Vs Actual Product**4%
*“As advertised”*
**Soft Feel**4%
*“soft material”*
**Foam**4%
*“Best Mattress Protector”*
**Water Resistance**4%
*“works well as waterproof”*
**Noise Level**1%
*“they are not noisy like other ones”*
**Cushion**1%
*“Nice wit added padding for comfort”*
### **What buyers complain about **
**Size-Overall**14%
*“DO NOT FIT”*
**Thickness**13%
*“not as thick as I thought”*
**Quality-Overall**13%
*“Not great quality”*
**Water Resistance**6%
*“was ment to waterproof not dont order this if needed waterproof mattress”*
**Advertised Vs Actual Product**4%
*“Photos are misleading”*
**Noise Level**3%
*“Made a noise when moving around in bed”*
**Thin**2%
*“Too thin”*
**Durability**2%
*“Only last 2-3 times unfortunately”*
**Stain Resistance**2%
*“There was a brown stain on the fabric even though I had removed it from the packaging”*
**Material Quality**2%
*“Material doesnt feel good quality”*
### **Top return reasons **
**Size-Overall**40%
**Material Quality**11%
**Quality-Overall**10%
**Water Resistance**8%
**Thin**6%
**Advertised Vs Actual Product**4%
**Noise Level**3%
**Thickness**2%
**Color**2%
**Stitch/Finish/Polish**2%
## **Common questions**
- **Is mattress cover king size bed profitable to sell on Amazon United Kingdom?**
- The niche generates £52K/yr across 36 tracked products. 4 of 8 products launched in the last 360 days are still selling. 90-day search growth is -11.5%. Flapen's verdict: Skip it (48/100).
- **How competitive is the mattress cover king size bed niche?**
- 24 brands and 33 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 68% of demand.
- **What do buyers complain about in mattress cover king size bed?**
- Top complaints mined from reviews: Size-Overall, Thickness, Quality-Overall. The return rate is 0.9%.
- **When does demand for mattress cover king size bed peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the mattress cover king size bed niche?**
- Listings span £6.80–£22.61; the average listing price is £12.56 (sweet spot $15–$100). The average incumbent carries 13,707 reviews — the moat a new listing must climb.
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