What Bed Size Should I Choose?
The right bed size depends on more than simply the number of people sleeping in it. You should consider your bedroom dimensions, available floor space, sleeping arrangements, height, personal comfort and future needs.
Whether you're furnishing a child's bedroom, upgrading your own bed, creating a guest room or looking for more space as a couple, understanding UK bed dimensions makes it easier to find a bed that works for both your room and your lifestyle.
Who Will Use It?
Decide whether the bed is for one person, two people, a child or occasional guests.
How Much Space?
Measure your room and allow enough space around the bed for comfortable movement.
Need More Room?
Consider moving up a size if you want additional sleeping space or more room to stretch out.
Check the Dimensions
UK bed sizes have standard mattress dimensions, but the overall bed frame can be larger.
UK Bed Sizes Explained
UK beds are available in several standard sizes, ranging from compact small single beds through to spacious super king beds. The dimensions below refer to the typical mattress size, so remember that the complete bed frame may be wider or longer.
2'6" · 75 × 190CM
Small Single
A small single bed is a practical choice for young children, compact bedrooms and smaller guest rooms. It provides a comfortable sleeping area for one person while taking up less floor space.
Shop Small Single Beds →3'0" · 90 × 190CM
Single
A single bed is one of the most versatile UK bed sizes. It is ideal for children, teenagers, solo sleepers and guest bedrooms where space needs to be used efficiently.
Shop Single Beds →4'0" · 120 × 190CM
Small Double
Also known as a three-quarter bed, a small double provides more width than a single without taking up as much room as a standard double. It can suit solo sleepers or couples with limited space.
Shop Small Double Beds →4'6" · 135 × 190CM
Double
The double bed is a popular choice for couples and solo sleepers who want extra room. It offers a good balance between sleeping space and bedroom footprint.
Shop Double Beds →5'0" · 150 × 200CM
King Size
A king size bed provides additional width and length compared with a double, making it a popular choice for couples who want more room to sleep.
Shop King Size Beds →6'0" · 180 × 200CM
Super King
A super king offers a generous sleeping area and is ideal for couples who want maximum space, provided the bedroom is large enough to accommodate the bed comfortably.
Shop Super King Beds →Which Bed Size Is Best for Me?
The best bed size depends on how you intend to use it. Use the guide below as a starting point, then consider your bedroom dimensions and personal preferences.
Small single and single beds are practical choices for children's bedrooms and growing families.
Single, small double or double beds can work well depending on how much sleeping space you prefer.
Double, king and super king beds provide progressively more sleeping space for two people.
King and super king beds can make a spacious bedroom feel more balanced while providing generous sleeping space.
How Much Bedroom Space Do I Need?
Before choosing a bed size, measure the room carefully. The mattress dimensions are only part of the equation because the bed frame, headboard, storage and other furniture will also use valuable floor space.
Measure the Room
Measure the length and width of the room before deciding which bed size is practical.
Plan Your Walkway
Leave enough usable space around the bed so you can comfortably walk around and access furniture.
Consider Other Furniture
Wardrobes, bedside tables, dressing tables, doors and drawers all need sufficient space to operate.
What Bed Size Is Best for Couples?
Couples often benefit from choosing a larger bed because two people naturally need more sleeping space. Your bedroom size and budget will ultimately determine which option works best.
Double
A practical choice for couples who want a standard-sized bed while keeping the bedroom footprint relatively compact.
King Size
A popular upgrade for couples who want more width and additional length without moving all the way to a super king.
Super King
The largest standard UK size in this guide, offering generous personal sleeping space for couples with a suitably large bedroom.
Does Your Height Affect Bed Size?
If you're taller than average, bed length is an important consideration. Standard single, small double and double mattresses are typically 190cm long, while king and super king mattresses are generally 200cm long.
Small single, single, small double and double mattresses are typically 190cm long.
King and super king mattresses generally provide an additional 10cm of length.
Remember that a longer mattress means the overall bed may extend further into your bedroom.
Should I Choose a Bed With Storage?
If bedroom storage is limited, choosing a bed with integrated storage can help you make better use of the available space. Ottoman beds and storage beds can provide useful space underneath the mattress without requiring additional floor-standing furniture.
Ottoman Storage
Ottoman beds lift the mattress platform to reveal storage space underneath, making use of the area beneath the bed.
Drawer Storage
Divan beds with drawers can provide convenient storage while keeping frequently used items easy to access.
Check the Clearance
Make sure there is enough room around the bed for drawers to open or for an ottoman mechanism to operate.
Is the Bed Frame the Same Size as the Mattress?
No. One of the most common mistakes when buying a new bed is assuming that the mattress size and overall bed dimensions are identical. The mattress has a standard sleeping area, while the complete bed can be larger.
Headboard
A wide or oversized headboard can increase the overall width of the bed.
Footboard
Some bed designs extend beyond the mattress at the foot of the bed.
Frame Structure
The construction and design of the frame can add additional width, length or height.
Should I Future-Proof My Bed Size?
A bed can last for many years, so it is worth considering how your needs may change. A size that works perfectly today may feel restrictive if your sleeping arrangements change in the future.
Consider whether a single or larger bed will continue to suit a growing child or teenager.
If you expect to share the bed in the future, additional sleeping space may become more important.
Think about whether you may move or change the layout of the room later.
If space allows, choosing a larger bed can provide additional comfort for years to come.
10 Things to Check Before Buying a Bed
Decide whether the bed is for one person, two people, a child or guests.
Measure the bedroom before choosing the size of your new bed.
Make sure you understand the mattress dimensions for the bed you choose.
The complete bed frame may be larger than the mattress.
Taller sleepers may appreciate the extra 10cm of length offered by king sizes.
Allow space for wardrobes, bedside tables, drawers and other furniture.
Consider doorways, hallways, staircases and room access before ordering.
Choose drawers or ottoman storage if additional bedroom storage would be useful.
Consider whether your sleeping arrangements or bedroom may change.
Make sure you can source the correct mattress and bedding for your chosen bed.
Ready to Choose Your New Bed?
Whether you need a compact single bed, a practical double, a spacious king or a luxurious super king, our collection offers a range of styles and sizes to suit different bedrooms and sleeping arrangements.
Shop All Bed Frames →Frequently Asked Questions About Bed Sizes
What are the standard UK bed sizes?
The standard UK sizes covered in this guide are small single, single, small double, double, king size and super king. Small single is typically 75 × 190cm, single is 90 × 190cm, small double is 120 × 190cm, double is 135 × 190cm, king is 150 × 200cm and super king is 180 × 200cm.
What is the most popular UK bed size?
Double beds are a popular choice because they offer a good balance between sleeping space and bedroom footprint. However, the best size for you depends on the people using the bed and the amount of space available.
What is the difference between a double and king size bed?
A standard UK double mattress is typically 135 × 190cm, while a king size mattress is typically 150 × 200cm. A king therefore provides an additional 15cm of width and 10cm of length.
Is a small double suitable for two people?
A small double can be used by two people, but it provides less sleeping width than a standard double. It can be useful where bedroom space is limited, although couples who prefer more personal space may find a standard double or king more comfortable.
What bed size is best for a tall person?
King and super king mattresses are typically 200cm long, compared with 190cm for small single, single, small double and double sizes. The additional length can be useful for taller sleepers.
How much space should I leave around my bed?
There is no single clearance that works for every bedroom, but you should leave enough usable space to comfortably walk around the bed and access other furniture. Always consider doors, wardrobes, drawers and other obstacles when planning your layout.
Is the bed frame the same dimensions as the mattress?
No. Mattress dimensions describe the sleeping surface, whereas the overall bed dimensions can be larger because of the frame, headboard, footboard and other design features. Always check the complete product dimensions before buying.
What size bed is best for couples?
Double, king and super king beds can all be suitable for couples. A double is more compact, while king and super king sizes provide progressively more sleeping space. If your bedroom allows, a larger bed can provide additional personal space.
Should I choose a bed with storage?
Storage beds can be particularly useful in bedrooms where floor space or storage is limited. Ottoman beds provide access to the area beneath the mattress, while divan beds can offer drawers for convenient storage. Read our Ottoman Bed Buying Guide →
More Bed & Mattress Guides
Find the Perfect Bed Size for Your Bedroom
Explore our range of UK bed frames in small single, single, small double, double, king and super king sizes to find the right combination of space, comfort and style.
Small Single Single Small Double Double King Size Super King