UK Mattress Size Guide: Single vs Double Dimensions | Sleep Better

Mattress Size

In the quest for a perfect night's sleep, understanding the dimensions of UK mattress sizes is essential. Whether you're furnishing a snug single room or a spacious master bedroom, the choice between single and double beds can significantly impact your comfort and room layout. This guide demystifies UK mattress sizes, focusing on the key differences between single and double bed dimensions, to help you make an informed decision tailored to your space and sleep needs.

1. Overview of bed and mattress sizes in the UK

In the UK, bed and mattress sizes are standardised slightly differently to other regions, which can be confusing for first-time buyers or buyers from other countries. Knowing these standard sizes will not only help you make a better decision, but will also ensure that the mattress you buy fits your bed frame perfectly.

Why is mattress size important?

The right mattress size is crucial to getting a good quality of sleep. A properly sized mattress provides enough room for you to turn over during the night without restriction, while also supporting and soothing your body so that you wake up feeling energised the next day.

Next, let's take a deeper look at the size differences between single and double beds and answer any related questions. Read on to discover the perfect mattress size for you.

Mattress Size

2. Differences in size between single and double beds

Is there a size difference between single and double beds in the UK?

Single beds in the UK usually measure 90cm (width) x 190cm (length), which is 3ft wide and 6ft 3in long. This size is suitable for most single adults or children and is particularly suitable for rooms where space is limited.

The double bed size, on the other hand, is defined in the UK as 135cm (width) x 190cm (length), or 4ft 6in wide and 6ft 3in long. This provides plenty of space for two adults, making it ideal for couples or singles looking to enjoy a more spacious sleeping area.

Are single mattress sizes the same as double mattress sizes?

Obviously, single mattresses and double mattresses differ in size to cater for different sized bed frames. Correctly matching mattress and bed frame sizes is essential to ensure comfort and support.

What are the dimensions of a single mattress in the UK?

As previously mentioned, the standard UK single mattress size is 90cm x 190cm. This size fits most single bed frames and is ideal for those designed for a single user.

How much larger is a double bed than a single?

Dimensionally, a double bed is 45cm (i.e. 1ft 6in) wider than a single bed. This means that a double bed offers more lateral space, allowing you to roll over more freely without disturbing your partner next to you.

Now that you understand the basic size differences between single and double beds, it's time to consider which mattress size is better suited to your needs. In the next section, we'll explore more details about special size beds and how to choose the best mattress size for you.

Read on for an in-depth look at how to choose the best mattress size for your individual needs and preferences.

3. Special size beds explored

What are the dimensions of a 180x200 bed?

In the UK, a 180cm x 200cm bed (approximately 6ft wide and 6ft 6in long) is often referred to as a 'Super King Size'. This size of bed offers the ultimate in spaciousness and comfort for those looking for a luxurious sleeping experience. This bed size is particularly suited to large bedrooms, providing plenty of space for sleep and ensuring that partners don't disturb each other, even on the most restless of nights.

Are double beds better than single beds?

Choosing a double or single bed depends on a number of factors, including individual sleeping habits, the amount of space available, and whether or not you're sharing the bed with others. Double beds offer more space and comfort, and are particularly suited to those who prefer more room to move around while they sleep, or need to share with a partner. Single beds, however, are more practical in smaller spaces or for single living.

Whatever your changing needs, the most important thing is to choose a mattress that offers enough support, comfort and space to meet your personal preferences.

Mattress Size

4. Mattress Size Selection Guide

Choosing the right mattress size is one of the key steps in ensuring a good night's sleep. Considering the following points can help you make a better choice:

  • Measure your room: Before choosing a mattress, make sure you measure your bedroom space to confirm the suitability of the chosen mattress size.
  • Consider the user's needs: Consider the user of the mattress, including their height, sleeping habits and whether they have special needs.
  • Budget: Mattress prices can vary greatly depending on size and type. Setting a budget can help you narrow down your choices.

5. Best Practices for Mattress Purchase and Maintenance

Purchasing a mattress is an important investment. Choosing a high-quality product and maintaining it properly will extend its life and ensure continued comfort.

  • Choosing a high-quality mattress: Look for reputable brands and products to ensure that the materials and manufacturing standards meet your needs.
  • Mattress maintenance: Flip and rotate your mattress regularly to prevent wear and tear being concentrated in one area. Using a mattress protector will prevent stains and dirt from building up.
  • Solving common problems: Knowing how to deal with common mattress problems such as dents or uneven wear can help you keep your mattress in top condition.


Choosing the right mattress size is crucial to getting a quality night's sleep. By understanding the different mattress sizes and the scenarios they are suitable for, you can make an informed choice based on your personal needs and preferences. Remember, a good night's sleep starts with the right mattress, so take the time to research and choose the one that's best for you.

We hope that this guide has helped you to better understand UK beds and mattress sizes so that you can choose the best one for you. Keep checking back with us if you have any more questions or need further advice. Let's take a journey towards a better night's sleep together!


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Q1: Is there a bed size between single and double in the UK?
A1: Yes, in the UK, there's a bed size known as a small double or three-quarter bed, which measures approximately 120cm in width by 190cm in length. It offers more space than a single bed without taking up as much room as a standard double bed.

Q2: Are single mattress sizes the same as double mattresses?
A2: No, single and double mattresses differ in size. A single mattress in the UK typically measures 90cm by 190cm, whereas a double mattress measures 135cm by 190cm.

Q3: What is the size of a single mattress in the UK?
A3: The standard size of a single mattress in the UK is 90cm in width and 190cm in length, which is approximately 3 feet wide by 6 feet 3 inches long.

Q4: How much bigger is a double bed compared to a single bed?
A4: A double bed is 45cm wider than a single bed in the UK. This provides additional space for individuals or couples, making it a more comfortable option for two people sharing a bed.

Q5: What bed size corresponds to 180x200 dimensions?
A5: The 180cm by 200cm bed size is known as a Super King Size bed in the UK. It offers ample space for individuals or couples, providing luxurious comfort and roominess.

Q6: Is a double bed preferable to a single bed?
A6: Whether a double bed is better than a single depends on personal needs and circumstances. A double bed offers more space and comfort for couples or individuals who prefer more room. However, a single bed might be more suitable for smaller spaces or individual use.

Q7: What options are available for those who need a bed size between a single and a double?
A7: For those needing a size between a single and a double, the small double or three-quarter bed is an excellent option. Measuring 120cm by 190cm, it provides extra space without occupying as much room as a double.

Q8: Can two adults comfortably sleep on a double bed?
A8: Yes, a standard double bed provides sufficient space for two adults to sleep comfortably, though personal space preferences may vary.

Q9: What considerations should be taken into account when choosing a bed size?
A9: Consider the size of the room, the number of people using the bed, personal comfort preferences, and the specific dimensions of available bed sizes to ensure the chosen bed meets your needs.

Q10: Are bed and mattress sizes standardized across the UK?
A10: Yes, bed and mattress sizes are generally standardized in the UK, with common sizes being single, small double, double, king, and super king. However, it's always best to check specific dimensions when purchasing, as some manufacturers may vary slightly.

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