Double vs King Size Bed: Which Is Better?

Choosing the right bed size can make a noticeable difference to your bedroom and your everyday comfort. If you are deciding between a double vs king size bed, the main things to consider are the amount of sleeping space you need, the size of your bedroom and how you normally use your bed.

In the UK, a standard double mattress measures 135cm × 190cm, while a king size mattress measures 150cm × 200cm. This means a king size gives you an extra 15cm in width and 10cm in length.

So, is a double or king size bed better? There is no single answer for everyone. The right choice depends on your room, sleeping habits and personal preferences.

Double vs King Size Bed: What Is the Difference?

The most obvious difference is the amount of space available.

Bed Size	Width	Length	Approx. Size
Double	135cm	190cm	4ft 6in × 6ft 3in
King Size	150cm	200cm	5ft × 6ft 6in

A double bed is compact enough for many bedrooms while still providing space for two people. A king size bed gives both width and extra length, making it useful for couples who prefer more room or taller sleepers who find a standard double a little short.

Remember that these measurements refer to the mattress. The actual bed frame can be larger depending on its design, headboard, footboard and side rails.

Is a Double Bed Big Enough for Two People?

For many couples, a double bed can work perfectly well. It provides a comfortable sleeping surface without taking up as much floor space as a king size.

However, two people have less personal space on a double. If one person moves around frequently during the night, the other may notice it more.

A double can also be a practical option for a guest bedroom. It gives visitors a proper sleeping area without using as much of the room as a larger bed would.

For a single sleeper, a double can provide plenty of room to move around, particularly if you enjoy having extra space while sleeping.

Why Choose a King Size Bed?

The biggest attraction of a king size bed is the additional sleeping space.

A UK king is 15cm wider and 10cm longer than a standard double. That extra space may not sound huge on paper, but it can make the bed feel noticeably less restricted, particularly when two people share it.

A king size can be particularly useful if:

• You share your bed with a partner.
• You like having more personal sleeping space.
• You are taller and need additional legroom.
• Children or pets sometimes join you.
• You have a spacious main bedroom.
• You prefer a larger, more relaxed sleeping area.

The extra length is one of the important differences between a double and king size bed. A king mattress is 200cm long compared with 190cm for a double.

Double or King Size Bed for a Small Bedroom?

Bedroom size should be one of the first things you consider.

A double bed usually leaves more floor space available for wardrobes, bedside tables, dressing tables and walking areas. This can make it a sensible choice when your bedroom is relatively compact.

A king size bed needs more room, so measuring before buying is important. You should consider not only where the mattress will sit but also the space needed to walk around the bed and open nearby doors, drawers and wardrobes.

Also remember that the bed frame may be wider or longer than the mattress. An elaborate headboard or thick side rails can add extra dimensions to the overall footprint.

Double vs King Size: Comfort and Sleeping Space

Comfort is not only about mattress quality. The amount of room you have can affect how relaxed you feel at night.

A double gives two sleepers approximately 67.5cm of mattress width each if the space is divided evenly. A king provides approximately 75cm per person.

That difference can be useful if you dislike feeling restricted while sleeping.

A king size may also suit couples with different sleeping habits. Having more room can make it easier for each person to settle into their own sleeping position without constantly getting in each other’s way.

That said, a larger bed is not automatically more comfortable. Mattress support, firmness, temperature regulation and your own sleeping position are also important factors.

Which Bed Size Is Better for Taller People?

If you are taller than average, the king size bed may be worth considering because it provides an additional 10cm of mattress length.

A standard UK double is 190cm long, whereas a king is 200cm long.

Those extra centimetres can make a difference if your feet regularly reach the end of the mattress.

Before choosing a bed, check the exact mattress measurements rather than relying only on the name of the size. Bed sizes can differ between UK and European standards, so make sure the mattress and frame are designed to work together.

What About the Cost?

Generally, a larger bed requires a larger mattress, bed frame and bedding, which can increase the overall cost.

You should think beyond the initial price of the bed. A king size may also require larger fitted sheets, a king duvet and other appropriately sized bedding.

If your budget is limited, a double may leave more money available for other aspects of your bedroom. On the other hand, if you plan to keep your bed for many years, the additional space of a king may be something you value every night.

It is useful to consider the complete cost rather than comparing bed-frame prices alone.

How to Decide Between a Double and King Size Bed

If you are still unsure, consider these questions before making your choice:

1. How many people will use the bed?

For one person, either size can work depending on the space available. For couples, think about whether you prefer a cosy sleeping arrangement or more personal space.

2. How large is your bedroom?

Measure the room carefully and mark out the approximate footprint of the bed. This can give you a much better idea of how much floor space will remain.

3. Are you tall?

If you need additional legroom, the 200cm length of a king may be more suitable than the 190cm length of a double.

4. Do you move around while sleeping?

If you tend to change positions frequently, extra mattress space can make sleeping more comfortable.

5. What other furniture needs to fit?

Think about bedside tables, wardrobes, dressing tables, radiators and doors. A bed should not make the rest of the bedroom difficult to use.

6. Have you considered the bedding?

Check that the size you choose has readily available mattresses, sheets, protectors and duvets that fit correctly.

Measure Before You Buy

One of the easiest mistakes is measuring only the mattress space and forgetting about the bed frame.

Before buying a double or king size bed, measure the available floor area and check the complete dimensions of the frame. It is also worth checking doorways, hallways and stairways, particularly if the bed will be delivered in larger sections.

Leave enough space to move around the bed comfortably and make sure wardrobes and drawers can still open fully.

Double vs King Size Bed: Which Should You Choose?

The choice between a double and king size bed comes down to the balance between available space and the amount of sleeping room you want.

A double can be a practical option for smaller bedrooms, guest rooms and sleepers who do not need a large sleeping surface. A king size offers more width and length, making it particularly useful for couples, taller sleepers and anyone who prefers additional room.

Rather than choosing based purely on the size of the mattress, consider your bedroom dimensions, sleeping habits, budget and the furniture you already have. Once you look at all of these factors together, it becomes much easier to find the bed size that suits your space and lifestyle.