mattress cover king size bed
Skip itA small market ($52K/yr) — this niche doesn't clear our bar today.
Returns
Incredible0.9%return rate — above 5% kills the launch gate
Conversion
Great7.6%search→purchase rate — share of searches ending in a sale
Brand share
Good68%top-5 brand share — brands hold most of the demand
Competition
Good49%top-5 click share — leaders hold, buyers still browse
Avg price
Good£12.56avg listing price — sweet spot $15–$100
Price range
Okay£6.80–£22.61cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Review moat
Bad13,707.28avg 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
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.No pronounced peak months · busiest ÷ quietest = 1.4×
Top mattress cover king size bed search terms
- king size mattress cover25K/yr
- mattress cover king size bed23K/yr
- bed protector king size4K/yr
- mattress protector king size bed3K/yr
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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Caroline Shatuik King Size Mattress Protector fitted Quilted Extra Deep 40cm Stretch Skirt Anti Allergy Mattress Cover (152 x 200) Not-Waterproof
CAROLINE SHATUIK£10.384.5★7,499 rev
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£8.764.5★15,783 rev
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£7.784.5★4,738 rev
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£9.894.5★11,349 rev
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£14.154.5★2,387 rev
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£9.80851 rev
Dreamzie King Size Mattress Cover for Moving Mattress Storage Bag Opaque Plastic Tear Resistant with Zip - King Size
Dreamzie£11.58206 rev
BEDLORE Waterproof Mattress Protector King Size Brushed Microfiber with Upgraded TPU Layer Extra Deep Pocket Hypoallergenic Breathable Noiseless Oeko-tex Mattresses Cover (Gray)
BEDLORE£20.89951 rev
Sylvanora King Size Mattress Protector 30cm Deep White 150 x 200cm
Sylvanora£15.1963 rev
Salt Valley Quilted King Size Mattress Protector Extra Deep 30cm Fitted Skirt Anti-Allergenic & Machine Washable Microfiber Mattress Cover (White 152x200 cm)
Salt Valley£17.70152 rev
Trending
90-day click momentumImperial Rooms King Size Mattress Protector Soft & Breathable Mattress Cover Extra Deep 40cm Easy to Fit bed Cover (152x200+40cm)
IR Imperial Rooms£9.804.2★
Dreamzie King Size Mattress Cover for Moving Mattress Storage Bag Opaque Plastic Tear Resistant with Zip - King Size
Dreamzie£11.584.3★
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£10.484.6★
PlushDeluxe Premium Bamboo Mattress Protector Waterproof Hypoallergenic & Ultra Soft Breathable Bed Mattress Cover & Protection -Free PVC Phthalate (UK King Size) White
PlushDeluxe£22.614.5★
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£6.804.3★
What buyers say about mattress cover king size bed
What buyers praise and complain about, mined from review topics.What buyers love
“EXCELLENT QUALITY”
“Easy fit”
“Cheap price”
“So comfortable”
“As advertised”
“soft material”
“Best Mattress Protector”
“works well as waterproof”
“they are not noisy like other ones”
“Nice wit added padding for comfort”
What buyers complain about
“DO NOT FIT”
“not as thick as I thought”
“Not great quality”
“was ment to waterproof not dont order this if needed waterproof mattress”
“Photos are misleading”
“Made a noise when moving around in bed”
“Too thin”
“Only last 2-3 times unfortunately”
“There was a brown stain on the fabric even though I had removed it from the packaging”
“Material doesnt feel good quality”
Top return reasons
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.