Bed & Mattress Sizes Guide

Choosing your next bed and mattress is a big decision and shouldn't be taken lightly, given that they're designed to last for many years in your home. But what are the different UK standard sizes, and how do you know which you need?

Our bed and mattress size guide, produced by our insightful bed comfort experts, can help you to confidently decide which size is best for your bedroom and your sleep requirements.

Are Mattress and Bed Sizes the Same?

While they're related, mattress measurements and bed sizes aren't the same. Mattresses don't have a headboard or legs, so their dimensions are smaller than an equivalent bed. With this in mind, be sure to measure your space for bed frames and not just a mattress.

Some UK retailers sell mattresses in EU sizes, which are different to UK standard mattresses: EU sizes are often wider or longer.

Standard UK Mattress Sizes

This table shows standard UK mattress sizes to help you choose the right fit for your bedroom and sleep needs.

The most popular UK bed and mattress sizes are single, double, and king.

UK Bed Size Chart

What Size is a Small Single Bed and Mattress?

A small single mattress is 75cm wide by 190cm long, 15cm narrower than a standard single, but the same length.

Small single divan bases match the mattress dimensions, and the mattress fits snugly. But if you choose a standard bed, bear in mind the frame will add 10-20cm to the overall width due to its design.

Who should get a small single?

Small single beds are ideal for:

●     Compact spaces like box or small rooms

●     Guest rooms that are used infrequently

●     Children's bedrooms, up to 8 years old

●     Twin rooms where two standard singles won't fit, as a small single bed can be placed side by side to create king size bed dimensions when pushed together.

What Size is a Single Bed and Mattress?

A single mattress is 90cm wide and 190cm long, the same length as a small single but 15cm wider than a small single, providing extra space to stretch out a bit more.

As with small singles, single divan bases match the mattress dimensions. If you add a headboard, it will add 10cm to the length.

Who should buy single beds?

●     Single sleepers or older couples who like to sleep separately.

●     Standard twin rooms, like those found in hotels and B&Bs.

●     Children's bedrooms, especially with bunk beds or high sleepers for older children.

Overall, single beds are the most popular of the smaller standard bed sizes, catering perfectly to compact spaces while still providing adequate sleep space.

What Size is a Small Double Bed and Mattress?

A small double mattress , also known as a queen or three-quarter, is 120cm wide and 190cm long, which is 30cm wider than standard single beds. This extra width offers more room to sleep comfortably and more freely.

Small double divan bases match the mattress dimensions for a snug fit, but standard bed frames will add 10-20cm to the width beyond the mattress size.

Who should get a small double bed and mattress?

A small double bed will work well in:

●     Teenagers' bedrooms, where a full double would feel too large

●     Double bedrooms with limited space, for a single adult sleeper or couples

●     Guest rooms, for couples staying overnight

Small double beds don't have the full width of a standard double, but still have enough room to relax and sleep. Small double ottoman beds are also great for maximising storage in compact bedrooms.

What Size is a Double Bed and Mattress?

A double mattress is 135cm wide and 190cm long, 15cm wider than a small double. This is the most common size in the UK as it balances plenty of sleeping space with floor area in smaller bedrooms.

The extra width over a small double is perfect for couples and individuals who want more wiggle room, so a double bed and mattress is the go-to choice for most standard bedrooms.

Who should get a double?

Double beds work well for:

●     Standard double or average-sized bedrooms

●     Couples

●     Guest rooms for medium to long-term stays

What Size is a King Size Bed and Mattress?

A king size mattress is 150cm wide and 200cm long, which is 15cm wider and 10cm longer than a standard double.

Those who’re used to a double bed find king size beds much more comfortable and luxurious.

Who should get a UK king size bed?

King size beds are for:

●     Couples

●     Parents with young children sharing their bed

●     Individuals who are easily disturbed by a partner's movements

●     Tall individuals

●     Large bedrooms

What Size is a Super King Size Bed and Mattress?

A super king size mattress is 180cm wide and 200cm long, making it the largest standard bed size. It has 30cm more width than a king size bed and the same length, so it is perfect for maximum comfort and room to spread out throughout the night.

Who should get a super-king bed?

Super-king mattresses and super king beds are massive , so they work well in:

●     Luxury homes for ultimate comfort

●     Open-plan rooms with plenty of space

●     Large master bedrooms, at least 250cm wide

What Size is a Zip And Link Bed and Mattress?

Zip and link beds are divan beds consisting of two small single or single mattresses to make one large bed. Two small singles equal a king, and two singles equal a super-king, so you can create a sleeping space for couples or individuals.

Zip and link beds have a large, heavy-duty zipper that runs along the edges of the mattresses. By unzipping/zipping this, you can join the two mattresses together tightly..

Who should get a zip and link bed?

Zip and link designs are the perfect bed in terms of adaptability and tailored comfort. They're best for:

●     Two adults with individual mattress preferences, enabling each to enjoy a better night's sleep

●     Guest rooms, thanks to their ability to be split into two beds or be kept as a larger frame

Bed Frames Size Considerations

When choosing a bed, it's essential to consider the following factors when choosing from different beds:

●     Mattress size : Make sure the bed is designed to accommodate the size of the mattress. A base that is too small for the mattress can lead to a poor fit, while one that is too large can leave too much space between the mattress and the frame. To ensure a proper fit, measure the mattress and the bed frame carefully before making a purchase. Or, simply choose a new bed from us and add a mattress to your order on the product page.

●     Bed frame style : Different bed frame styles have varying dimensions. For example, a platform frame may have a smaller footprint than a traditional frame with a headboard and footboard. This can affect the overall size and fit of the bed in your bedroom.

●     Bedroom space : Consider the size of the bedroom and the space available for the bed. A larger frame may not fit in a smaller bedroom, while a smaller bed frame may get lost in a larger room. It's important to balance the bed size with the available bedroom space to create a harmonious and functional layout.

By taking these factors into account, you can choose a bed frame that not only fits your mattress perfectly but also complements your floor space.

Room Layout for Optimal Bed and Mattress Fit

The layout of the bedroom can greatly impact the fit of the mattress. To ensure an optimal fit, consider the following factors:

●     Room dimensions : Measure the length and width of the bedroom to determine the maximum size of the bed that can fit comfortably. This helps in selecting the right bed size, whether it's a single bed, a double bed, or even a super king size bed.

●     Doorway and hallway clearance : Make sure the bed can be easily moved through doorways and hallways without damaging the walls or the bed. This is especially important for larger bed sizes like king size beds and super king size beds.

●     Window placement : Consider the placement of windows in the bedroom and how they may impact the placement of the bed. For instance, placing the bed under a window might affect natural light and ventilation.

●     Furniture arrangement : Arrange furniture in a way that creates a comfortable and functional space. For example, place a dresser or nightstand on either side of the bed to create a sense of balance. This not only enhances the room's aesthetics but also ensures that the bed and mattress fit well within the overall layout.

By considering these factors, you can create a bedroom layout that optimises the fit of the mattress and creates a comfortable and functional space. This thoughtful approach ensures that your bed and mattress not only fit well but also enhance the overall bedroom experience.

What Size Bed and Mattress Should I Buy?

Ultimately, this comes down to your available floor space and needs:

●     For couples : A double usually works, but a king size is recommended for couples with young children or if one partner is a light sleeper. King size is also particularly good for mixed-weight couples who feel each other's movements during sleep.

●     For children : A single is ideal for children aged 5+, but a small single can be suitable up to around 8 years of age.

●     For the elderly : Small singles can be an option, but a standard single is often better for extra space and comfort.

Speak To Us About Your New Bed

Choosing the right bed and mattress size is key to creating the perfect night’s sleep and the perfect bedroom. Whether you’re upgrading to a spacious king, switching from a single to a small double, or refreshing your guest space, understanding UK bed sizes ensures you make the right choice. 

Explore our full range of beds and mattresses at Comfybedss today to find your ideal match. Or, let our expert team help you discover your dream bed or mattress by contacting us today at info@comfybedss.co.uk .