Bed Mattress Sizes UK Guide

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Is your bed and mattress right for you? Are your feet sticking out the end of the bed? Find the right size high quality bed mattress and get a good nights sleep.

I was frustrated when I bought a mattress for my bed only to realise it was the wrong size for me. The terminology for mattress sizes doesn’t give you the actual size. Rather than saying ‘this is a single mattress’ why don’t they say ‘this is a mattress measuring 90 cm by 190 cm!?? Added to this retailers like IKEA don’t use the standard UK sizes.

UK Bed mattress sizes chart

Here are all the UK bed mattress sizes in inches and feet as well as centimetres lengths and scales in a mattress sizes chart. This chart detailing mattress sizes from smallest to biggest will enable you to run a mattress size comparison in order to choose the best mattress for you whether its in feet and inches or CM. Especially important to understand the size of the mattress if you are buying a quilt or any kind of bedding as they vary.

With this in mind I created a table which shows you all the measurements compared and who they are ideal for:

Bed Mattress Type
Width in Cm
Length in Cm
Width in feet & inches
Length in feet & inches
Small single mattress751902 Feet 6 Inches6 Feet 3 Inches
Single mattress901903 Feet 0 Inches6 Feet 3 Inches
Small double (Queen) mattress1201904 Feet 0 Inches6 Feet 3 Inches
Double mattress1351904 Feet 6 Inches6 Feet 3 Inches
King size mattress1502005 Feet 0 Inches6 Feet 6 Inches
Super king size mattress1802006 Feet 0 Inches6 Feet 6 Inches

For standard mattress sizes UK check the below chart which lists all the standard regulation English and UK mattress sizes that apply to foam, divan and sprung mattresses along with the measurements in a handy guide for use when you are choosing bed mattresses. If you are looking to purchase an IKEA mattress and are worried it might not fit the dimensions of your bed check out the IKEA mattress sizes guide to work out the scale of the mattress widths and mattress lengths. If you are looking for bed sizes I’m afraid there isn’t a chart for this as there isn’t a standard for bed sizes they are all bespoke as I explained in my bed sizes page

Beds and mattresses for tall people

Checking out the right length of mattress is especially important if you are a tall person. If you are under 6ft 6 inches then the standard larger size mattresses should be adequate to accommodate your longer body. The biggest standard mattress size is the Super King-size at 6 ft 6 inches or 180cm by 200 cm even bigger than a king size. If you are very tall however and more than 6 ft 6 inches then the best option would be to consider a custom bespoke mattress and bed which are available to make sure its comfortable enough. That is unless you don’t mind sleeping diagonally or with your feet hanging off the bed.

You will find that the standard UK mattress dimensions shown here will be to small to accommodate your body. Obviously upgrading the mattress will mean upgrading the bed frame too. Be careful if you intend on getting a bed with a footboard or a headboard as these will often mean the difference between a bed fitting your body length and not. If you go for a custom bed remember you will need to get custom bedding too that means custom fitted sheets and covers.

Mattress sizes comparison

As you can see mattress sizes are defined by a name and below is the hierarchy from smallest to largest using a specific name rather than a number. These mattress names are a standard and there shouldn’t be any variance, however there may be a variation in dimensions dependent on the bed used. To see how the different sizes compare have a look at the following diagram which shows each mattress size by order. As an explanation of this in picture format I have produced the following graphic which shows each mattress name side by side from smallest to biggest so you can make a mattress size comparison:

mattress dimensions compared

To ensure that you get the comfort and a good nights sleep you are looking for check the sizes and consider your body length before purchasing. Make sure its long enough for your height and wide enough to accommodate whomever is sleeping in the bed. The difference between the different standard mattress sizes could mean the difference between being comfortable compared with being uncomfortable. And that means not sleeping properly!

Obviously your bedroom dimensions will also come into play but bear in mind that the bed itself will determine the space required not the mattress unless of course you intend to just use a standard divan bed base. Standard bed sizes charts don’t exist as their are no standards for the bed. If you are using a standard box base then the size of the bed will be the same as the mattress.

Mattress depth sizes

As with bed sizes there is no mattress depth standard. Mattress depths can range from 9 inches (22.86 centimeters) to 16 inches (40.64 centimeters) depending on how they are manufactured or the type of mattress construction. A pillowtop mattress with its extra layer of comfort will increase the depth further. The actual thickness of your mattress shouldn’t make a huge amount of difference as the effect can be offset by the height of the bed if you are looking to adjust for ease of getting into bed. If you are looking to buy bed sheets however you will need measure the dimensions and depth of the mattress. Dependent on the thickness of the bed you may also need deep pocket sheets to get the sheets to fit.

What are IKEA & non standard mattress sizes?

If you are looking for IKEA mattress sizes check this IKEA mattress sizes chart. Many retailers will go much bigger than the king size and even super super king size mentioned above. Be warned that the king size bed dimensions will be significantly larger with certain retailers taking up a lot of space in your bedroom. Getting an extra long or full size mattress that will fit you might mean you need to get it custom made. There are retailers that will make both custom dimension beds and mattresses. If you are concerned with a hotel mattress size I would recommend checking with the hotel manager before you book or your feet might be hanging of the end of the bed!

Children grow up fast so its best to provide something that they can grow into. There is little point in buying a small kids mattress when they will grow out of it increasing the price of the bed and mattress long term.

About bed sizes

The above chart shows the standard mattress sizes and dimensions for bed mattress sizes in England and the UK. This will serve as a measurement guide if you intend to buy your mattress in Britain. This is not a UK bed sizes chart, bed size guide, bed dimensions chart or bed size scale as there is no standardisation and British beds come in varying sizes just as they do in any other country. If you are looking for a British bed size guide, bed sizes in feet and inches or bed sizes in cm I would suggest checking out the bed in person with a tape measure to check that there isn’t any feature of the bed frame that requires more space. Some retailers will stock odd sizes using an odd European dimension or other special measurements. Be sure to clarify with the stockist before you purchase.

Mattress size conversion from imperial to metric

The list above shows metric and non metric mattress sizes. US still use a non metric mattress scale but the British have mainly gone metric so If you are looking for a mattress size converter to do a U.S. to UK mattress sizes conversion here is how to calculate:

One inch equals 2.54 centimetres
One foot equals 30.48 centimetres
One meter equals 39.37 inches

All mattress brands in the UK will follow the above conventions so when you are buying consult this first and get your measurements before you buy your mattress.

What are futon mattress sizes?

Futons don’t use conventional sprung mattresses and have a folded mattress topper which forms the basis of the couch. There are many Futon producers many of which are completely custom made. As a result of this futon mattress sizes when extended into ‘bed mode’ don’t tend to follow any kind of standard mattress size format. As the mattress has been custom made for the futon frame if you want to buy a replacement mattress for the futon you will need to contact the original futon producer. When the futon is folded into ‘couch mode’ again there are no standard sizes. For each futon check with the futon supplier for size and dimensions when folded and when extended to a bed. Other bespoke beds such as trundle (also known as trumple beds, truckle beds or hurly-beds) will also need to be looked at on a case by case basis. The twin beds will need to be measured individually both the top bed and the slide out bed if it is being used as a bed rather than storage space.