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Bed & Mattress Size Guide

Bed & Mattress Size Guide

The first place to start when looking for a new mattress is knowing the right size to go with your bed frame. But with so many sizes available, it can feel a little daunting knowing which one will actually fit. This guide goes through everything you need to know about different mattress sizes, including their dimensions, and how to choose the right one for your needs.

Choosing The Right Size Mattress For Your Bed

When selecting a mattress for your bed, getting the measurements right is key. This is particularly important if you are purchasing your individual bed frame and mattress. You’ll also want to ensure that the mattress gives you the space you want, and is the right size for the room it’s going in. A few additional centimetres can make a real difference to how comfortable you feel at night.

Mattress Sizes


As previously mentioned, there are a wide range of mattress sizes available. This includes UK and European sizes, the latter being a little larger than the former. Both of these types of mattresses are made to set standard sizes. As such, there should be very little variation in length and width across them. However, height may vary with different models.

Single Mattress Dimensions

UK single mattresses typically measure 90cm (width) x 190cm (length). These types of mattresses are great for older children, as well as smaller bedrooms. These are also the same sized mattresses used in standard sized bunk beds.

Small Double Mattress Dimensions

A standard UK small double mattress measures 120cm (width) x 190cm (length). This is a great option for teenagers, and anyone who would like a double mattress but has limited space.

Double Mattress Dimensions

UK double mattresses have the standard measurements of 135cm (width) x 190cm (length). This mattress is a popular choice - it’s suitable for a wide range of room sizes and can comfortably sleep two people.

King Size Mattress Dimensions

UK king size mattresses measure 150cm (width) x 200cm (length). This is the next step up from the double mattress, being both wider and longer. If you have a large bedroom and are looking for extra space in bed, this is a great mattress to go for.

Kids Mattress Dimensions

Kids mattresses typically measure 70cm (width) x 140cm (length). These are much narrower than standard UK single mattress. This makes them suitable for younger children who require a smaller mattress and bed.

European Single Mattress Dimensions

European single mattresses measure 90cm (width) x 200cm (length). These are longer than UK single mattresses, making them a great option for narrower bedrooms.

European Double Mattress Dimensions

European double mattresses measure 140cm (width) x 200cm (length). Like other European mattresses, this is longer than its UK counterpart. This mattress is great for those looking for the width of a standard double mattress, but with a bit more length.

European Queen Mattress Dimensions

European queen size mattresses measure 160cm (width) x 200cm (length). This is wider than a typical UK queen size mattress. This option is suitable for those looking for a larger mattress that isn’t as wide as a super king.

Mattress Size & Bed Frame Size


Ensuring that your mattress fits your bed frame will help it stay secure during the night. This is especially important to consider if you move a lot whilst you sleep. This not only helps your sheets stay in place, but will also make for a more comfortable sleep. An ill-fitting mattress may cause back pain, body aches, and overall poor quality sleep.

How Do I Know What Mattress Size To Choose?


Choosing the right size mattress for your bed frame is a vital step in ensuring a good night’s sleep. Getting this right is important whatever stage in your journey you’re at - whether you’re buying each part individually, looking to replace your older mattress, or just want to see what the options are. And the good news is, it isn’t too complicated to figure it out.


When purchasing a bed frame, it should come with size details of the mattress that they fit. However, we recommend knowing the precise measurements needed before purchasing. This way, you can ensure that the mattress you choose will fit firmly and securely in your bed frame.

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