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54

super king

Worth a look

Shows low returns (0.9%), but a small market ($60K/yr) keeps it on the watch list.

Market size 15Growth 18Conversion 31Competition 86Returns 95Price range 81Avg price 85Brand share 85Review moat 24Quality gap 58

Returns

Incredible0.9%

return rate — above 5% kills the launch gate

Competition

Great29%

top-5 click share — an open shelf

Brand share

Great50%

top-5 brand share — no brand owns this niche

Avg price

Great£18.91

avg listing price — sweet spot $15–$100

Price range

Great£5.99–£58.86

cheapest to priciest tracked listing — scored on the share inside $15–$100

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Conversion

Okay2.5%

search→purchase rate — share of searches ending in a sale

Review moat

Bad6,751.03

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-14.2%

90-day search growth — must beat 0% to launch

Market size

Bad£60K

£60K/yr · 127K searches

According to Flapen's Amazon United Kingdom niche tracking, super king is a £60K/yr Amazon United Kingdom market (127K searches/yr). The top 5 brands hold 50% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Worth a look — 54/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

super king market data

Units sold / yr
2K–3K
avg 0–100/product
Revenue / yr
£38K–£47K
units × avg price
Conversion rate
2.5%
Avg BSR
#110
Page quality
0%
Prime
77%
Sponsored
85%
Out of stock
9.3%
Avg brand age
47 months
Avg seller age
184 days

Competition & brand share

Clicks spread well past the top 5 (29% combined) — an open shelf where new products get seen.

Brands

32 falling

Sellers

42

Top-5 brand share

50%

Top 20: 92%

Top-5 click share

29%

Top 20: 64%

Open market

44%

  • Sapphire Collection12%
  • Yard12%
  • Linens World10%
  • Utopia Bedding8%
  • Catherine Lansfield8%
  • Filo Magico7%

Demand & seasonality

Weekly Amazon search volume, last 78 weeks — -14.2% search growth over the last 90 days.
5K4KPrime Day '25Spike '25FebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJunJul

Peak months: Sep, Oct, Nov · busiest ÷ quietest = 1.7×

Top super king search terms

  • cotton superking duvets sets9K/yr
  • super king cotton duvet set14K/yr
  • superking duvets sets cotton12K/yr
  • super king bed set14K/yr
  • superking cotton duvets sets8K/yr
  • super king8K/yr
  • duvet cover super king8K/yr
  • super king quilt cover8K/yr
  • super king duvet cover cotton9K/yr
  • duvet set super king size7K/yr
All search terms

Top super king 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%3%£2K6%£4K9%£5K12%£7K1101001K10K100K Reviews — right = deep review moat Market 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.

What buyers say about super king

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall30%

“Excellent Quality”

Soft Feel14%

“Nice and smooth”

Size-Overall10%

“Fits lovely on mattress nice quality will be back to buy some more again many thanks”

Value For Money9%

“Good value for money”

Comfort-Overall8%

“SO SOFT AND COMFORTABLE”

Washability4%

“And washes well”

Material Quality4%

“Great quality and ideal to keep cool with the 100% cotton material”

Color4%

“Lovely colour”

Upholstery/Fabric Quality3%

“Lovely light 100% cotton quality fabric at such a great price”

Warmth2%

“Warm and comfortable to sleep on especially on a cold day”

What buyers complain about

Size-Overall14%

“its too big”

Quality-Overall12%

“not the quality I was expecting”

Material Quality8%

“I was really disappointed with the feeling of the material”

Advertised Vs Actual Product6%

“Not at all how it looks in the pictures”

Smell6%

“Smell”

Touch/Button Controls4%

“Broken buttons that dont fit”

Hard Feel4%

“Not soft at all”

Durability4%

“Slight rip”

Washability4%

“Looked nice not even used as it tore apart after the first wash very disappointing”

Stain Resistance4%

“Returned product as duvet was covered in patchy dye marks identical on both sides”

Top return reasons

Size-Overall29%
Color25%
Material Quality14%
Quality-Overall8%
Advertised Vs Actual Product4%
Thin3%
Value For Money2%
Soft Feel1%
Stain Resistance1%
Smell1%

Common questions

Is super king profitable to sell on Amazon United Kingdom?
The niche generates £60K/yr across 65 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -14.2%. Flapen's verdict: Worth a look (54/100).
How competitive is the super king niche?
32 brands and 42 sellers compete. The top 5 products take 29% of clicks and top 5 brands hold 50% of demand.
What do buyers complain about in super king?
Top complaints mined from reviews: Size-Overall, Quality-Overall, Material Quality. The return rate is 0.9%.
When does demand for super king peak?
Demand peaks in Sep–Oct–Nov; the busiest month runs 1.7× the quietest.
What does it cost to enter the super king niche?
Listings span £5.99–£58.86; the average listing price is £18.91 (sweet spot $15–$100). The average incumbent carries 6,751 reviews — the moat a new listing must climb.