A king size mattress measures 150 x 200cm and gives two adults around 75cm of personal space each - noticeably more than a double, and the reason most couples who make the upgrade say they wished they had done it sooner. At Land of Beds, we've been helping people across the UK find the right mattress for over 50 years. Whether you want a pocket spring that handles two sleeping bodies with minimal disturbance between them, a hybrid that combines natural airflow with foam pressure relief, a luxury handcrafted mattress with natural fillings for temperature management, or a zip-and-link option for two different tensions side by side, our king size range has the right answer. Free mainland UK delivery, a Price Promise Guarantee, and honest advice from people who know this category properly come as standard.
Browse the full range below, or use our guides to find the right construction and tension for the way you both sleep. Our team is available seven days a week for a personal recommendation.
Most people buying a king size mattress have already decided on the size. The room takes it, they want more space, and they're ready to invest properly. What they're working through is which construction suits both of them, whether the tension is right for two people with different weights, and which brands are worth the premium. At Land of Beds, we've been helping couples work through exactly this for over 50 years, with honest advice and no pressure to buy.
Three things determine whether you choose the right king size mattress. Get these right and the brand and price decision becomes much more straightforward.
| Factor | Why It Matters | What to Check |
|---|---|---|
| Construction type | A king is almost always a couples' mattress. Construction determines how much movement transfers between partners, how well the mattress handles two different body temperatures, and how long it performs under daily use by two people. | Pocket spring vs hybrid vs memory foam - the motion transfer difference matters significantly at this size |
| Tension for two | Two people of different weights and sleep positions sharing one mattress is the most common challenge in this category. The wrong tension for one partner affects both of them every night. | Both partners' weights and sleep positions; whether a zip-and-link option is needed for significant weight differences |
| Long-term value | A king size mattress is a significant purchase. Buying one step below what you need to save money and replacing it in four years is consistently more expensive than buying correctly the first time. | Construction quality, guarantee length, brand reputation for durability |
Not sure which construction suits both of you? Speak to our team on 01928 242829 - we'll ask a few questions and give an honest recommendation.
A standard UK king size mattress measures 150 x 200cm (5ft x 6ft 6in). This is the size to use for all standard UK king size bed frames.
| Dimension | Measurement | Notes |
|---|---|---|
| Width | 150cm (5ft) | Gives two adults approximately 75cm each - slightly more than a single bed per person |
| Length | 200cm (6ft 6in) | 10cm longer than double and single sizes. Suits sleepers up to 6ft 3in comfortably. |
| Typical depth | 25 to 40cm | Deeper mattresses are not automatically better. Depth follows construction - what matters is the quality of the materials inside. |
King size is 15cm wider and 10cm longer than a standard double. For most couples, that extra width is the meaningful difference - 75cm per person versus 67cm is a change that affects how much each partner feels the other move during the night.
See our UK Bed Sizes Guide for full room-measuring advice including the minimum clearance needed around a king.
At king size, construction matters more than at any other size because the mattress is almost always shared. Here's a plain comparison of every type we stock in king size.
| Type | Key Features | Best For |
|---|---|---|
| Pocket Spring | Individually wrapped springs that move independently; natural airflow; filling layers on top; responsive feel | Couples wanting minimal partner disturbance; hot sleepers; those who prefer a traditional, buoyant surface |
| Memory Foam | Contours closely to the body; pressure relief; absorbs movement; can retain heat unless gel-infused | Couples where both sleep still; those with significant pressure point discomfort; those who prefer a very quiet surface |
| Hybrid | Pocket springs with foam or latex comfort layers; airflow and edge support from springs with pressure relief from foam on top | The best all-round choice for most couples; combines the strengths of both constructions |
| Latex | Naturally responsive, breathable, hypoallergenic, durable | Hot sleepers; allergy-sensitive buyers; those wanting a long-lasting natural material |
| Orthopaedic | Firmer construction for spinal alignment; available in pocket spring and foam bases | Couples where one or both have back concerns; heavier sleepers needing consistent firm support |
| Luxury / Handcrafted | Natural fillings (wool, cashmere, cotton, silk); hand-tufted; made to last a decade or more; from brands like Hypnos, Vispring, Harrison Spinks | Long-term investment buyers; those who prioritise natural materials and craftsmanship |
Choose a pocket spring king if:
Choose a memory foam king if:
Choose a hybrid king if:
Choose a latex king if:
Choose a luxury or handcrafted king if:
Our team hears this from customers upgrading from a double more often than anything else: they didn't realise how much they had been disturbing each other until they stopped. For couples where one partner is a lighter or more restless sleeper, the combination of more width and a pocket spring or hybrid construction is often the most significant sleep improvement they make.
Tension for a shared king size mattress needs to account for both partners. When weights differ significantly, getting the tension right for both becomes more important than at any other size.
| Tension | Best For | What It Does |
|---|---|---|
| Soft | Lighter sleepers under 60kg (9st 6lb); side sleepers needing significant shoulder and hip relief | Good pressure relief; may feel unsupportive for a heavier partner sharing the bed |
| Medium Soft | Combined couple weight where both are lighter; side sleepers | Balances cushioning and support; suits couples where both are under 75kg (11st 11lb) |
| Medium | The most popular tension for couples at king size; combined weight 130 to 180kg; combination sleepers | Good all-round support across two body weights; enough cushioning for side sleepers without compromising alignment |
| Medium Firm | Couples where one or both are heavier; back and front sleepers | Firmer surface for spinal alignment; better for couples where one partner is notably heavier |
| Firm | Heavier individuals over 100kg; front sleepers; those needing maximum spinal support | Minimal sink; strong support; may feel too hard for a lighter partner sharing the bed |
For couples with a weight difference of more than 25kg, consider asking our team about zip-and-link options. Two mattresses of different tensions joined together gives both partners the tension suited to their weight. See our super king mattresses for zip-and-link options.
The materials inside a king size mattress determine how well it performs for two people over many years. Natural fillings become noticeably more relevant at this size because temperature management for two sleeping bodies matters more.
| Material | Performance and Maintenance | Best For |
|---|---|---|
| Pocket Springs | Independent spring movement reduces partner disturbance significantly. Higher spring counts mean more responsive support per person. No maintenance beyond rotation. | Couples; hot sleepers; everyday main bedroom use |
| Natural Fillings (wool, cotton, cashmere, silk) | Breathable and temperature-regulating year-round. Particularly valuable when two people generate body heat overnight. Found in mid-range to luxury king mattresses. | Temperature-sensitive sleepers; couples who sleep warm; long-term investment buyers |
| Memory Foam | Pressure-relieving. Durable. Standard versions retain heat - more noticeable when two people are using the mattress. Gel-infused versions manage this better. | Still couples; those prioritising pressure relief over airflow |
| Latex | Naturally breathable, responsive, hypoallergenic. Longer lifespan. Heavier than foam. | Hot sleepers; allergy-sensitive buyers; those wanting durability |
| Gel Foam | Actively draws heat away from the sleeping surface. More relevant at king size where two bodies generate more heat. | Hot couples; warmer rooms |
See our Mattress Buying Guide for more detail on how construction affects long-term performance.
A king size mattress in a main bedroom used nightly by two people is one of the most used items in the home. Budget should reflect that.
| Budget | What You Get | Best For |
|---|---|---|
| Under £400 | Entry-level pocket spring or foam. Functional for lighter use. Shorter lifespan under daily use by two people. | Guest rooms; occasional-use king bedrooms |
| £400 to £699 | Better construction, improved comfort layers, more tension choice, improved durability for shared use. | Secondary bedrooms; couples wanting comfort without a premium price |
| £700 to £1,199 | Natural filling options, stronger edge support, longer guarantees, better long-term performance for two daily users. Where most main bedroom king buyers land. | Main bedroom king used every night by two people |
| £1,200 and above | Premium and handcrafted natural fillings, extended guarantees, luxury materials. Built to last a decade or more under two daily users. | Long-term investment; master bedrooms; those buying from Hypnos, Vispring, or Harrison Spinks |
For a main bedroom used nightly by two people, the quality gap between the entry-level and the mid-range is more pronounced at king size than at any other. The materials need to support two sleeping bodies every night.
Mike Murray, Land of Beds CEO: "A king size mattress in a main bedroom takes more load than any other mattress in the house. It's used every night by two people, it shapes how both of them feel in the morning, and it lasts longer if you buy it properly the first time. The £400 to £700 range does a lot of heavy lifting for most couples - but if you're sleeping on it for ten years, spending an extra £200 at the outset tends to pay for itself."
Looking for a quality king size mattress at a lower price? We stock entry-level king size options from trusted brands with regular promotions throughout the year. Browse and filter by price to see what's currently available.
Our Price Promise Guarantee means you won't pay more than you should. Finance is available on eligible orders, with interest-free options on selected terms. See our finance page for details.
Not sure whether to go king or super king? Here's a plain comparison.
| King Size Mattress | Super King Mattress | |
|---|---|---|
| Dimensions | 150 x 200cm (5ft x 6ft 6in) | 180 x 200cm (6ft x 6ft 6in) |
| Space per person | Approximately 75cm each | Approximately 90cm each - similar to a single bed per person |
| Room requirement | Minimum room width around 3.0m | Minimum room width around 3.2m, ideally 4.0m+ |
| Zip-and-link availability | Less common at king size | Widely available at super king - two separate mattresses joined |
| Best for | Couples wanting more space than a double in a standard main bedroom | Couples with significant sleep disruption, larger rooms, or very different tension preferences |
For most couples in a standard UK main bedroom, king size is the right choice. Super king is the better option when the room is large enough and either partner is a particularly restless or light sleeper. See our super king mattresses to compare.
| Item | Typically Included? |
|---|---|
| Mattress | Yes - always |
| Removable, washable cover | Sometimes - check the individual product listing |
| Trial period | On selected models only - check before ordering |
| Bed base or frame | No - unless part of a bundle or divan set |
| Mattress protector | No - sold separately and strongly recommended for a mattress at this price point |
Always check the individual product listing for full details before purchasing.
| What We Offer | Why It Matters to You |
|---|---|
| 50+ years of expertise | Deep knowledge of king size mattresses across every brand, construction, and couple scenario |
| Genuinely independent advice | We're not tied to any brand. Our recommendation is based on how both of you sleep. |
| Leading brands across every budget | From entry-level to luxury handcrafted from Hypnos, Vispring, and Harrison Spinks |
| Free mainland UK delivery | Free on orders over £100. Some remote postcodes may incur a charge. |
| Price Promise Guarantee | Find it cheaper like-for-like elsewhere and we'll match it |
| Flexible finance available | Interest-free options on selected terms - see our finance page |
| Expert advice, 7 days a week | Real people via phone, chat, or in-store. No pressure. |
| 9,000+ verified Trustpilot reviews | Real feedback from real customers on products, advice, and service |
Choosing a king size mattress for two people involves more variables than any other size. Our team has helped thousands of couples work through exactly this - and there's no obligation to buy. Visit our showrooms in Cheshire and Greater Manchester to try mattresses in person, or reach us online. We're open seven days a week.
| How to Reach Us | What to Expect |
|---|---|
| Live chat | Fast responses for quick questions. Available during opening hours. |
| Phone: 01928 242829 | Speak directly with a mattress expert. Best for tension and construction advice for two people. |
| In-store (Cheshire / Greater Manchester) | Try king size mattresses with your partner before you buy. The difference between constructions is much clearer in person. |
| Email: [email protected] | For non-urgent questions. We aim to respond within one working day. |
| Help Centre | Buying guides, size guides, and FAQs available 24/7. |
| Question | Answer |
|---|---|
| What size is a king size mattress in the UK? | A standard UK king size mattress measures 150cm wide by 200cm long (5ft x 6ft 6in). This is 15cm wider and 10cm longer than a standard double mattress, giving two adults approximately 75cm of personal space each. |
| Is a king size mattress worth the upgrade from double? | For most couples in a room that takes it, yes. The extra 15cm of width means approximately 75cm per person compared to 67cm on a double - a difference most couples feel clearly in terms of how much they disturb each other. Measure your room first and allow comfortable clearance on both sides. If the room takes a king with ease, it's worth it. |
| What is the best king size mattress for couples? | For couples, pocket spring or hybrid is almost always the strongest choice. Individually wrapped pocket springs move independently, meaning one partner's movement carries less to the other side. Hybrid mattresses combine this with foam pressure relief on top. Tension should be chosen around the heavier or more movement-sensitive partner. |
| What is the best king size mattress for back pain? | For most people with general back discomfort, a medium to medium-firm pocket spring or hybrid gives the right balance - firm enough to maintain spinal alignment but not so firm it creates pressure points. For more specific guidance based on your sleep position and weight, call our team on 01928 242829. |
| What tension should I choose for a king size mattress? | For couples, choose based on the heavier partner's weight and sleep position as a starting point. If both partners are of similar weight, medium suits most couples where both are in the 70 to 90kg range. If there's a significant weight difference, ask our team about zip-and-link super king options that let both partners have different tensions. |
| How long should a king size mattress last? | A quality mid-range king used every night by two people should last between 7 and 10 years. Premium and handcrafted mattresses from brands like Hypnos and Vispring often last considerably longer. Using a mattress protector from night one and rotating as recommended both extend the lifespan. |
| What is a zip-and-link king size mattress? | A zip-and-link mattress is two separate mattresses joined together by a zip along one side. It allows two people sharing a bed to have different tensions - useful when there's a significant weight difference between partners. Zip-and-link is more commonly available at super king size than king. Ask our team which brands offer it at king size. |
| Do you offer free delivery on king size mattresses? | Yes. Free mainland UK delivery on orders over £100. Some remote postcodes may incur a charge - check at checkout. Lead times vary by brand; check the individual product listing. |
| Can I buy a king size mattress on finance? | Yes. Finance is available on eligible orders, with interest-free options on selected terms. See our finance page for eligibility and how to apply. |
| Should I buy a king or super king mattress? | Measure your room first. A super king is 30cm wider than a king and needs a minimum room width of around 3.2m with comfortable clearance. For most couples in a standard UK main bedroom, king is the right choice. Super king is worth considering if the room is genuinely large, if one partner is a very restless sleeper, or if a significant tension difference means zip-and-link is needed. See our super king mattresses. |
