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A king size bed is the upgrade most people dream about: more room to stretch out, more space for two, and a bed that feels properly generous. But once you’ve decided on king size, there’s a second choice that matters just as much and gets far less thought, the base format. A king size divan, ottoman and bed frame are three quite different beds, and the right one depends on your room, your storage needs and your taste. This guide compares them, so your king size upgrade is the right one in 2026.
King size dimensions and the room you need
In the UK, a standard king size measures 150cm wide by 200cm long, which is a noticeable step up from a double’s 135cm, giving each person more width and a bit more length. That extra size needs room around it, though. As a rough guide, you want enough clear floor to walk and make the bed on both sides, which tends to mean a room of around 3 by 3 metres or larger sits a king comfortably. In a tighter room, a king can work but starts to dominate, so measure honestly before committing. If you’ve the space and want even more, a super king at 180cm is the next step up, which we’ll come to.
Divan, ottoman or frame at king size, compared
At king size, the format you choose changes the storage, the height, the look and the feel of the bed. Here’s how the three stack up.
|
|
King divan |
King ottoman |
King bed frame |
|
Storage |
Drawers, or none |
Large lift-up cavity — the most |
Usually none |
|
Height and presence |
Tall, substantial |
Tall, substantial |
Varies — often lower |
|
Under-bed airflow |
Less |
Less |
More |
|
Statement shape |
Understated base plus headboard |
Understated base plus headboard |
Shows off sleigh, wingback and more |
|
Ease of moving |
Bulky; often splits |
Bulky; often splits |
Dismantles more readily |
|
Best for |
Value, storage, hotel feel |
Maximum storage, small-to-mid rooms |
A statement silhouette, airflow |
There’s no single winner; each suits a different priority. A king divan is the value-and-storage all-rounder with a substantial, hotel-like presence. A king ottoman gives you the most under-bed storage of all, which at this size is a lot, and needs no floor clearance. A king frame is the one to choose if you want a shaped, statement silhouette and prefer more airflow.
Storage at king size
One underrated benefit of going king size is that the under-bed storage grows with the bed. A king ottoman offers a genuinely large cavity, enough for bulky bedding, cases and seasonal clothes, while a king drawer divan gives generous drawers. If storage is on your list, king size and a storage base together are a powerful combination, and our guide to beds with storage covers the options. A king frame, by contrast, usually leaves that space unused, so factor storage into the format decision.
Comfort and the mattress at king size
The point of a king is comfort and space, so the base’s feel matters. On a divan or ottoman, the platform-top versus sprung-edge choice decides whether the bed feels firm and supportive or softer and more forgiving, and our guide to divan beds explains that build decision. For couples especially, a king’s extra width reduces disturbance when one person moves, and a supportive base plus a quality mattress makes the most of that space. Remember that a deeper mattress adds to the overall height, which on a tall king base makes for a bed that’s easy to get in and out of, though worth checking against your ceiling if you’re pairing it with a tall headboard.
Style at king size
A king size bed is inherently a statement, and it’s worth dressing it like one. A tall or winged headboard suits the scale beautifully, and our wingback bed frames guide covers the options, while upholstered wall panels behind a king bed deliver the full hotel-suite effect, as our beds with wall panels guide shows. Crisp, layered bedding and a bit of symmetry finish the look; our hotel-style beds guide pulls the whole thing together. At this size, restraint reads as luxury, so let the generous bed lead and keep the styling calm.
King or super king: should you size up?
If your room can take it, a super king at 180cm wide is the ultimate upgrade, giving each person close to the width of a small single to themselves. It’s a wonderful choice for couples who value space, but it needs a genuinely large room to sit comfortably, and it costs more across the bed and bedding. If you’re weighing the two, our guide to the best beds for couples looks at when super king is worth it. For most rooms and most people, a king hits the sweet spot of generous space without overwhelming the room; step up to super king only if the room clearly has room to spare.
The king size mattress question
A bigger bed deserves the right mattress, and there are a couple of king-specific points. For two people, a supportive mattress that limits motion transfer makes the most of a king’s extra width, so one person moving disturbs the other less, which is half the reason couples upgrade in the first place. Firmness is personal, but a medium-firm mattress with a plush top suits a lot of couples by balancing support and comfort. And remember the mattress adds to the overall height, so a deep mattress on a tall king base sits high, which is easy to get in and out of but worth checking against a tall headboard and your ceiling. Choosing the base and mattress together, rather than in isolation, gives the best result.
King size bedding and the practical side
It’s a small thing, but worth knowing before you upgrade: a king size bed needs king size bedding, so factor in new duvets, sheets and mattress protectors alongside the bed itself. It’s a one-off cost, easily overlooked, and buying a couple of good sets from the start keeps the bed looking its best. Larger bedding also takes a little more airing and laundering, though nothing dramatic. None of this is a reason not to size up; it’s simply part of the picture, so the upgrade holds no surprises.
King or double: is the upgrade worth it?
If you’re stepping up from a double, the honest answer for most couples is yes, provided the room can take it. A double at 135cm gives each person less width than a single, which is why couples so often feel short-changed by one, while a king’s 150cm restores real personal space and cuts disturbance at night. The trade-offs are the room it needs and the cost of the bed and bedding. If your bedroom is genuinely too small, a double may be the sensible ceiling, but where there’s room, the jump to king is one of the upgrades people rarely regret.
A quick king size buyer’s checklist
Before committing to a king, run through the essentials. Is the room big enough to leave walking and bed-making space on both sides, ideally around 3 by 3 metres or more? Which base format suits your priorities, a divan or ottoman for storage and value, or a frame for a statement shape and airflow? Have you chosen the base build, platform-top or sprung-edge, for the feel you want? Have you budgeted for king size bedding alongside the bed? And have you checked the access, the doorways and especially the stairs, confirming whether the base splits? Tick those off and a king size upgrade goes smoothly.
King size for growing families
A king size bed isn’t only for couples; it earns its place in a family home too. The extra width is welcome when small children or pets pile in at the weekend, and the generous surface makes for comfortable bedtime stories and lazy mornings. Paired with a storage base, a king holds the family’s spare bedding and overflow as well, and finished in an easy-care fabric it copes with the reality of family life. For a main bedroom that doubles as the household’s gathering spot, the space a king offers quietly proves its worth.
Getting a king bed into the room
A king size base is large, so plan the journey in. Divan and ottoman bases frequently split into two halves to get up a tight British staircase, but confirm that before you order rather than discovering it on the landing. Measure the doorways, the hall and the stairs, and check the delivery details. A little planning here saves the one genuinely stressful part of buying a big bed.
Who king size suits
A king size bed suits couples who want more space, anyone tall who finds a double short, and anyone with a bedroom large enough to carry it. Choose the format to match your priorities, storage, statement shape or value, and a king becomes the generous, restful centrepiece a main bedroom deserves.
Where Justbed fits
At Justbed we offer king size across divan, ottoman and framed formats, so you can pair the generous size with the storage, height and style your room needs. Get the format right alongside the size, and a king size bed delivers exactly the sense of space and luxury that made you want to upgrade in the first place.
