Your child needs a new mattress or a bunk bed, but you’re still confused about bed sizes in the UK.

Do people generally use the bed size? Is a question you find yourself asking frequently. What kind of savings could I anticipate if I purchased a bed frame and mattress individually? How much bigger are king beds than standard double beds? Which one will help with my insomnia? All these questions are enough to make anyone anxious, so we whipped together this cheat sheet to put your mind at ease.

In the UK, beds are referred to by the largest mattress size they can accommodate, rather than the measurements of the actual bed frame. This leads to a common source of misunderstanding.

Mattress sizes are frequently used as a rough indicator of potential available space. Because of this, it is more practical to include the size of the bed frame when calculating the available floor area. These vary from frame to frame and are usually greater than the mattress dimensions.

Bed sizes and mattresses in the UK are often promoted and sold in the metric equivalents, while being made to imperial standards. So, it is essential to be sure of the size you need before going out and making a purchase.

Comparison of the Sizes of a Mattress and a Bed Frame

Did you know that the king size mattress is the most popular choice for customers in the UK? Figuring out what size of mattress would fit in a given space can be challenging. If you wish to squeeze a somewhat larger mattress into your bedroom, it is vital to verify just how big and heavy a mattress is.

This is especially true if you have limited space in your bedroom. After all, is there anyone who doesn’t wish they had a larger bed? We cover all there is to know about bed sizes so that you can choose the right bed for your bedroom.

If you’re in the market for a new bed, it’s important to be sure it will fit in your space. Since this is the case, it’s important to learn which varieties of bed frames frequently come in larger measurements.

These bed frames typically use metal or wood for the structure which is why the mattress sits directly on top of it. However, before making a purchase, it is highly advised that you carefully examine the bed’s dimensions.

Check out our guide to mattresses for additional information on choosing the right bed size UK. Furthermore, the bed frame determines the mattress size for children’s beds, from toddler through single to bunk beds.

Bed Frame Dimensions Based on the Chosen Style

The measurements of your bed will be different from one bed frame model to another if you select the following options:

  • Divan base: Without a headboard, the bed’s proportions match those of the mattress.
  • Wooden base: Bed frames constructed of wood are usually a few centimeters larger on all four sides than the mattress.
  • Upholstered base: The proportions of an upholstered bed frame depend on its sleigh shape, quantity of embellishment, and fabric.

Always verify the dimensions of the bed before making a purchase to ensure that it will fit in the room and that there will be enough room to maneuver around the edges of the bed.

Mattress and Bed Sizes UK

Here are the standard mattress and bed sizes UK:

Type of Bed Frame size Mattress Size
Single Bed 75 inches long x 35 inches wide  6 feet 3 inches x 3 feet wide
Double Bed 75 inches long x 54 inches wide 6 feet 3 inches x 4 feet 6 inches
King size bed 78 inches long x 60 inches wide 6 feet 6 inches x 5 feet wide
Super king size bed 78 inches long x 72 inches wide 6 feet 6 inches x 6 feet wide

It’s important to remember that, while these are the standard measurements for beds and mattresses, there may be modest variations in size from brand to brand.

Taking precise measurements of the room is necessary to achieve a comfortable fit of the bed and mattress in the designated space.

Bunk beds 

As a rule, bunk beds in the UK are smaller in scale and intended for the use of children. For the most part, the mattresses you plan to use in a bunk bed will dictate the size you need.

Here are some standard bunk bed sizes UK:

Type of Bunk bed Frame size Mattress Size
Single bunk bed 75 inches long x 35 inches wide  Designed to hold two single mattresses
Small double bunk bed 75 inches long x 48 inches wide Designed to hold two small double mattresses
Double bunk bed 78 inches long x 54 inches wide Designed to hold two double mattresses

It is essential to consider the ages of the children who will be utilizing the bunk bed and their sizes to guarantee that the bed will be both secure and comfortable.

Giant beds in the UK 

So, what are the biggest bed sizes? Giant beds, often known as emperor’s size beds or giant beds, are beds that are far larger than those considered standard in the UK.

They normally measure at least 84 inches wide and 84 inches long, which is equivalent to 7 feet wide and 7 feet long. People who require or simply prefer to have more room when sleeping can benefit from the additional space and comfort that these beds provide.

It is essential to take into consideration the fact that normal bed sizes are more prevalent than giant beds. These kinds of beds may be harder to locate and may also be more expensive. In addition, they may require a larger bedroom in order to be comfortable.

Before making a purchase, you should take the time to measure the space in which you intend to position the bed to ensure that it will be able to be used comfortably. Additionally, you should think about the price and whether or not larger bed sizes are readily available.

Here are some standard giant bed sizes UK:

Type of Giant Bed Frame size
Emperor size bed 84 inches long x 84 inches wide
Caesar size bed 96 inches long x 96 inches wide
Alexander size bed 108 inches long x 108 inches wide

None of the aforementioned guidelines are hard and fast rules regarding the size of a giant bed. You have complete control over the dimensions of your enormous bed, provided that there is adequate room in your bedroom for it.

It’s important to note that these sizes may vary slightly from manufacturer to manufacturer. Therefore, it’s always a good idea to measure the space where you plan to put the bed to ensure a good fit.


When looking for a bed, there are many things to consider, including the following: the size and design of the bed; the dimensions of the room in which it will be placed; the number of people who will be sleeping on it; the amount of comfort and support that the bed offers; and the number of people who will be sleeping on it. However, the first thing you need to do is measure the space that you intend to put the bed in with as much precision as possible.

When purchasing a bed for your child, it is vital to take into consideration the child’s age as well as their size to ensure that the bed is both safe and pleasant for the child. It is crucial to choose a bunk bed for a child that has a strong structure and several safety measures if you want to ensure the child’s safety. Bunk beds can be an enjoyable and space-saving alternative for youngsters.

With these considerations in mind, you should be able to locate a bed that not only satisfies your requirements but also falls within your price range. Happy shopping!