Best King Size Mattress 2026: 10 Ranked, Four Spec Sheets That Contradict Themselves

It sits first because of the ratings, not the price. The NOFFA averages 4.9 from 120 ratings, with 92 of those at five stars, making it the strongest score in this list. It is also the only orthopedic king size mattress here that declares four figures of springs, at 1,000 pocketed coils against 800 from the TeQsli, NIXNAP and Deegari.

In practice the build is a 30 cm hybrid: gel memory foam over 1,000 individually pocketed springs split into seven support zones, finished as a Euro Top, weighing 31 kg. The listing offers a 100-night trial and notes that adapting to a new bed usually takes about two weeks, which lines up with the length of that trial.

The catch is firmness. The listing's own first bullet says feel varies by body weight: firmer under 70 kg, balanced at 70–80 kg, softer at 80–100 kg, and possibly not optimal for long-term support above 100 kg. So 'medium firm' is a moving target here. Its data also disagrees with itself: the construction type field says 'Memory Foam' while the material type says 'Springs and Memory Foam'. If you need to move a bed alone, 31 kg at 30 cm deep is awkward in a narrow hallway.

With 950 ratings at 4.5, this is the most-reviewed listing in the top half of the table, and at £139.99 the second-cheapest. However, its own spec sheet reports 'Number of Mattress Coils: 7' for a mattress sold as a pocket-sprung hybrid. That figure cannot describe a spring base, and it is not a number any buyer should use to compare this bed with the 800-coil models further down.

By contrast, the physical measurements are consistent: three layers, a tight top, and a breathable cover with dust mite and hypoallergenic claims. This 150 x 200 cm mattress is the thinnest of the ten at 22 cm, and it arrives vacuum-packed in a carton of roughly 38 x 38 x 84 cm, needing 48–72 hours to reach full height.

That said, two different weights are quoted in the same listing — 27.1 kg in the bullet text and 26.5 kg in the specification — which suggests the copy and the data were edited separately. Skip it if you want a deep, plush surface: 22 cm of foam and springs is a firmer, flatter proposition than the 30 cm beds at the top of this list.

Cheapest of the ten at £118.99, and the only one that states a maximum user weight in pounds: 700 lb, roughly 317 kg. It declares 800 pocketed coils across seven zones and a 4.5 average from 473 ratings, which is the second-largest review base in the article.

As a king size hybrid mattress it measures 25 cm, or 10 inches, and weighs 28 kg, with a breathable knitted cover, reinforced edges and handles on both sides. As a result, rotating it is more practical than on the handle-free models. The foam is certified to CertiPUR-US and the fabric to OEKO-TEX, and the listing states the mattress is fibreglass-free.

Worth noting: the layer count is given as 11, more than double the three to five layers declared by its closest rivals, with no breakdown of what those layers are. There is also no trial period mentioned here, unlike the NOFFA, NIXNAP, Mellsom and OraCool listings. If you want to test a bed for 100 nights before committing, this is not the one.

Nine support zones is the highest zone count of any king size mattress in this list, and £127.49 buys them along with a 100-night trial and cooling memory foam. The average is 4.6 from 108 ratings. Meanwhile the coil count is not disclosed anywhere, unlike the listings from NOFFA, TeQsli, Deegari, Mellsom and OraCool.

The mattress is 25 cm, or 10 inches, thick and weighs 29.5 kg, with five layers, a polyester cover and edge reinforcement. Individually wrapped springs are said to isolate movement, the foam is CertiPUR-US certified and the cover carries OEKO-TEX. It ships vacuum-packed and the listing asks for at least 72 hours to expand fully.

Even so, two things give pause: the care instruction is 'hand wash only', which is impractical for a 29.5 kg mattress, and 6 of the 100 ratings recorded here are one star. If you want a coil number to weigh against the 1,000-spring NOFFA, this listing will not give you one.

A 4.8 average from 101 ratings is the second-best score in this list, and £127.49 matches the NIXNAP. Crucially, the listing quotes two different footprints: 150x190 cm in its own bullet text and 150x200 cm in the size field — a 10 cm gap on exactly the dimension buyers use to check a bed against a frame.

The declared hardware is a 7-zone pocket spring core with 660 coils, eight layers, a Euro Top finish and a knitted cover, at 25 cm and 27.2 kg. Memory foam sits on top, and the foam is CertiPUR-US certified with an OEKO-TEX 100 fabric claim. A 100-night trial and 10-year support are stated in the same bullet.

That said, 660 coils is the lowest declared spring count among the beds here that give one, and no maximum user weight appears anywhere in the specification. This king size mattress is a reasonable pick if you are under about 90 kg and want a mid-price hybrid. If you are heavier, or you want certainty about the size before ordering a frame, confirm the dimensions on the page first.

At £129.99 this is the deepest mattress under £130 in the article: 28 cm, or 11 inches, on a 4.6 average from 285 ratings, the second-largest review base after the Twirest. However, the listing never states a coil count, so it cannot be ranked against the 1,000-spring NOFFA on that measure.

The specification describes a 7-zone pocket spring structure with memory foam, breathable fabric, reinforced edges and low motion transfer, at 30.5 kg. It arrives vacuum-packed, and the listing says it suits sprung bases, bunk beds, slatted bases and floor setups. As a 5ft king size mattress it is quoted consistently at 150 x 200 x 28 cm across all three dimension fields.

There is a data clash worth noting: the construction type field reads 'Memory Foam' even though the bullets and the highlight field describe pocket springs. In short, treat the spring description as the seller's claim and the missing coil number as the gap. Skip it if you want a documented spring count, a stated weight limit or a lighter bed to move.

800 pocketed coils and a 300 kg weight limit for £157.99, on a 4.5 average from 75 ratings, which is the smallest sample in the top eight. At 25 kg it is also the lightest full-depth hybrid here, which makes it one of the easier ones to get up a staircase.

The build is listed as a 2-layer hybrid: high-density memory foam over individually pocketed springs, with a stretch knit cover described as anti-pilling and skin-friendly. It measures 25 cm, or 10 inches, and arrives compressed in a box, needing 48–72 hours to decompress and to lose its packing smell.

The catch is that a two-layer description does not explain where 800 coils sit, and the size field simply reads 'King 150cm' rather than a full set of measurements — you have to take 200 x 150 x 25 cm from the separate dimensions field. If you want a long track record of buyer feedback to read before spending £157.99, 75 ratings is thin.

£170.99 buys a 25 cm pocket-sprung bed with a cotton blend cover and a 4.6 average from 73 ratings. By contrast with the Deegari, though, it declares no coil count and no maximum user weight, so two of the numbers buyers compare are simply missing from the page.

The listed construction is a spring system with three layers — memory foam, cotton and individually bagged springs — described by the seller as soft to medium firmness. It weighs 25 kg and is quoted at 150 x 200 x 25 cm, with hypoallergenic and breathable claims and independent spring movement for motion isolation.

That said, the listing asks for 72 hours after unboxing before use, and unlike the four beds offering a 100-night trial, no trial or warranty period appears in this data. It is a straightforward mid-price option; it is not the one to choose if you want documented spring numbers or a returns window.

At 33 kg this is the heaviest mattress in the list, and at £199.99 the third-dearest. It is also the one whose own data contains the clearest error: the thickness field reads '26 Picometre' while every other field and the title say 26 cm. A picometre is a trillionth of a metre, so that field is simply wrong — and it sits in the number shoppers use to compare depth.

The rest of the spec is specific: 720 individually wrapped pocket springs over seven zones, a 7-layer build with 1cm Blue Air memory foam and contoured foam, a quilted knit cover, and OEKO-TEX certified materials. A 100-night sleep test and a 5-year warranty are stated. As a king size mattress it measures 200 x 150 x 26 cm.

Even so, two limits stand out. The maximum user weight is 130 kg, the lowest of the three listings here that state one, and 37 ratings is by far the smallest sample in the article. Either way, verify the depth on the page before you buy a deep fitted sheet.