If you have ever gone mattress shopping, and wondered what the dimensions of a king size matress are, it is an easy answer but the details matter. In the UK a standard king size mattress dimensions is 150cm x 200cm or approximately 5ft x 6ft 6 inches.  Therefore, they tend to have an appeal for couples wanting more width than a double bed offers, but not taking the measurement of a super king.

The confusion comes from bed sizes being different around the world.  What is called a king bed UK is different from what would be called a king size in the US or Europe.  That is why it is worth breaking things down so you know what you are going to get and can confidently bought a new mattress.

Understanding King Size Bed Dimensions

When people search for king size bed dimensions uk, they generally want to know two things; will it fit in their bedroom, and will it feel spacious enough to sleep comfortably in. The mattress size is 150 cm by 200 cm, but when we account for a bed frame, headboard or storage ability options, this footprint will generally be a couple of cm bigger.

 For those who think in feet and not cm, the king size bed dimensions in feet are 5 ft by 6 ft 6 in. This is the ideal balance between comfort and practicality, ideal in a medium to large bedroom.

How Does a Double Bed Compare?

Before upgrading, many people compare a Super king size bed to a Double Bed. Double bed size is 135 cm wide and 190 cm long, or about 4 ft 6 in x 6 ft 3 in. A double offers sufficient space for one person sleeping alone, or two people who would be happy to have one another close, however, the width is much more apparent when two people are sleeping on it. 

When two people sleep on a king size bed, both strangers have more space and can increase the amount of sleep most will get - especially if one partner tends to toss and turn.

The Step Up to Super King

Of course, if space isn’t an issue, many dream about going bigger. The definition of a super king size bed size cm is 180 cm in width and 200 cm in length. It is a full 30 cm wider than a king and all but feels like 2 single beds pushed together. For families that occasionally have children or pets join them at night the super king is the ultimate comfort.

Queen Size Beds Explained

Another source of confusion comes from the queen size bed dimensions in cm. While 'queen' is not a mattress size that is commonly found in the UK, it is still regarded as quite common in the world, not least in the USA. A queen mattress will generally be 152 cm wide and 203 cm long, which is not that much width wider than a double, while it is actually the same length as a king. 

If you find bedding labelled as for a queen, you need to know that this will not stitch to UK sizes. As really the same as anything from online shopping, always check the label before buying, especially sheets and duvets.

Complete Guide to Bed Sizes in the UK

Here’s a quick reference for bed sizes UK and how they relate: 

• Single: 90cm x 190 cm (3 ft x 6 ft 3 in)

• Small Double: 120 cm x 190 cm (4 ft x 6 ft 3 in)

• Double: 135 cm x 190 cm (4 ft 6 in x 6 ft 3 in)

• King: 150 cm x 200 cm (5 ft x 6 ft 6 in)

• Super King: 180 cm x 200 cm (6 ft x 6 ft 6 in)

As you can see from the above scale, there is a variation in dimensions for each size to allow just that little bit of extra width or length to fit into different lifestyles and different rooms.

Choosing the Right Size for Your Room

Now that you are aware of a king size mattress dimensions, the next choice is whether it's appropriate for your space. If your bedroom is small, then perhaps a double mattress  would be a better option, allowing space for wardrobes and for bedside tables. However, in medium or large rooms a king size seems to fit naturally in.

While a good way of going about this is leaving at least 60--70 centimeters of floor space around bed to avoid you feeling crowded in the room and promote balance. 

Why Mattress Size for Sleep is Important

In addition to fitting your room, mattress size will relate directly to sleep quality. A king size mattress will allow a couple to stretch out over the majority of the surface without disturbing the other person. Additionally, taller sleepers can appreciate this additional length as opposed to a double bed. Or in addition to a proper frame and bedding, the mattress will also make a visual statement in the room, it will be the focal point of the overall design. 

Choosing the right size isn't just providing a good night's sleep, it's an investment in creating a stress reducing living environment that cultivates deep restorative sleep, day in and day out.

In Conclusion

So just how big is an exact king size mattress? In the UK, king size is 150 cm by 200 cm (5 ft by 6 ft 6 in), a good size fits the bulk of the criteria for comfort, space, and feasibility. For choosing a bed, it's good to think of it in comparison to double bed size in cm, consider how it relates to super king size bed dimensions cm, and just to stay in tune, remember queen size bed dimensions cm. 

So, if you are choosing your first king, or just looking to upgrade your existing setup, the exact bed sizes UK will help you to work out the best fit for your lifestyle and the space in your bedroom.