What is the Best Mattress for Single Beds to Ensure Better Sleep?

Finding the best single mattress can make a surprisingly big difference to your sleep, especially when you live in London and space is often at a premium.

A single mattress is a practical choice for a child’s bedroom, guest room, student accommodation, spare room or compact London flat. But choosing the right one is about much more than finding a mattress that fits a 3ft bed.

The right mattress should support your body, suit your sleeping position, manage temperature comfortably and work with your bed frame. It should also provide the right balance of comfort and support for the person actually sleeping on it.

So, what is the best single mattress for a good night’s sleep?

The short answer is: there isn’t one mattress that is best for everyone. The ideal choice depends on your body, sleeping position, preferred firmness, budget and the type of bed you have.

This guide explains exactly what to look for when buying a single mattress in London.

What Is the Best Single Mattress?

The best single mattress is one that provides consistent support while allowing your shoulders and hips to settle comfortably without excessive sinking.

For most adult sleepers, a good-quality medium to medium-firm single mattress is a sensible starting point. However, personal preference matters.

Side sleepers may prefer a little more cushioning around the shoulders and hips, while back sleepers often benefit from a more supportive feel. Heavier sleepers may also need a mattress with stronger underlying support and good edge stability.

The key is not simply choosing the firmest mattress available.

A mattress that is too firm can create uncomfortable pressure points, while one that is too soft may allow your body to sink too far into the sleeping surface.

Which single mattress should you choose?

Sleeper	Mattress characteristics to consider
Side sleeper	Pressure relief and cushioning
Back sleeper	Balanced support and a supportive core
Combination sleeper	Responsive surface that allows easy movement
Hot sleeper	Breathable materials and good airflow
Guest bedroom	Comfortable, versatile medium feel
Child or teenager	Supportive construction suitable for growing bodies
Adult in a small London bedroom	Durable, supportive mattress with good space efficiency

The best choice is ultimately the mattress that feels comfortable and keeps your body properly supported throughout the night.

What Size Is a UK Single Mattress?

A standard UK single mattress is generally 90cm wide by 190cm long, equivalent to 3ft by 6ft 3in.

That makes a single bed particularly useful in London bedrooms where floor space can be limited.

However, don’t assume every single bed or mattress is exactly the same.

Older beds, imported frames and specialist furniture can use different dimensions. Before buying a new mattress, measure the internal area where the mattress sits rather than relying solely on the name “single”

Single vs small single vs small double

These sizes are easy to confuse:

• Single: approximately 90cm × 190cm
• Small single: approximately 75cm × 190cm
• Small double: approximately 120cm × 190cm

A Continental single can also be 90cm × 200cm, so always check the measurements before ordering.

This is especially important in London flats, where replacing the wrong-sized mattress can be an expensive and inconvenient mistake.

How to Choose the Best Single Mattress for Your Sleeping Position

Your sleeping position is one of the easiest ways to narrow down your mattress options.

Best single mattress for side sleepers

If you normally sleep on your side, look for a mattress that combines support with pressure relief.

Your shoulders and hips carry more pressure in this position. A mattress with suitable cushioning can allow these areas to sink slightly while the rest of your body remains supported.

Memory foam, pocket springs and hybrid mattresses can all work well for side sleepers, depending on their individual construction and firmness.

Avoid choosing a very firm mattress simply because you believe “firmer means better support”.

Support and firmness are not the same thing.

Best single mattress for back sleepers

Back sleepers generally need a mattress that supports the natural alignment of the spine without allowing the pelvis to sink excessively.

A supportive medium-firm or firmer mattress may be suitable, although body weight and personal preference also affect the ideal feel.

Pocket sprung, hybrid and supportive foam mattresses can all be appropriate choices.

The most important factor is whether the mattress keeps you comfortably supported rather than creating a noticeable dip beneath your lower back.

Best single mattress for combination sleepers

If you regularly move between your back, side and front during the night, a highly responsive mattress can make changing position easier.

Pocket springs and many hybrid designs offer a combination of support and responsiveness.

A mattress that is too deeply contouring can sometimes make movement feel more restricted, particularly for combination sleepers.

Which Mattress Type Is Best for a Single Bed?

There are several common mattress constructions available in the UK.

Pocket sprung mattresses

Pocket springs are individually enclosed springs designed to respond more independently to movement.

A well-made pocket sprung mattress can provide a supportive, responsive feel while allowing airflow through the spring system. Our Luxury 1000 – Simplybedsonline also provides edge to edge support.

For a guest bedroom or everyday single bed, pocket springs can be a particularly versatile option.

Memory foam mattresses

Memory foam responds to body heat and pressure, creating a more contouring feel.

This can be appealing if you like the sensation of being gently supported by the mattress rather than sleeping “on top” of it.

Memory foam can also be useful for sleepers who value pressure relief, that is why our Cloud Memory Mattress is the perfect option for memory foam mattresses.

However, if you tend to sleep hot, look for designs with breathable construction and suitable ventilation rather than assuming every memory foam mattress will feel the same.

Hybrid mattresses

Hybrid mattresses combine different materials, commonly springs with foam or other comfort layers.

They aim to provide the responsiveness and airflow associated with springs while adding cushioning from foam or similar materials.

For shoppers who aren’t sure whether they prefer springs or foam, a good hybrid can offer a useful middle ground. Our Hybrid Gel 1000 Mattress  gives the best of both worlds – memory foam and pocket springs.

What Mattress Firmness Should You Choose?

Firmness is one of the most misunderstood parts of buying a mattress.

There is no universal firmness level that is perfect for everyone.

A person’s body weight, sleeping position and personal preference all influence how a mattress feels.

For example, a mattress described as “medium-firm” may feel relatively firm to one sleeper and noticeably softer to another.

Don’t choose firmness based on marketing alone

Terms such as:

• Soft
• Medium
• Medium-firm
• Firm
• Extra firm

are useful starting points, but they aren’t a substitute for considering your individual needs.

If possible, try the mattress in your normal sleeping position.

When testing a mattress, lie down rather than simply sitting on the edge. Spend enough time in your usual position to assess whether your shoulders, hips and lower back feel properly supported.

Why Mattress Quality Matters in a London Bedroom

London bedrooms can be compact, particularly in flats, converted properties, student accommodation and older terraced homes.

That means a single bed can be an excellent way to preserve valuable floor space.

But saving space doesn’t mean you should compromise on sleep quality.

A mattress is something you use for several hours every night. Spending a little more on appropriate support and durable construction can be worthwhile compared with replacing an uncomfortable low-quality mattress prematurely.

When comparing mattresses, look beyond the headline price.

Consider:

• Mattress construction
• Materials
• Depth
• Firmness
• Expected durability
• Delivery arrangements
• Compatibility with your bed base
• Whether you can try the mattress before buying

The cheapest single mattress isn’t necessarily the best-value single mattress.

Best Single Mattress for a Guest Bedroom

If you’re buying a single mattress for a spare room, versatility is usually more important than choosing a highly specialised design.

A comfortable medium-feel mattress can suit a wider range of guests than an extremely soft or extremely firm model.

If your guest bedroom is used frequently, prioritise durability and support as well as price.

For occasional guests, a simpler mattress may be perfectly adequate.

Either way, remember that the mattress should still match the bed frame’s dimensions and any depth restrictions.

Best Single Mattress for Children and Teenagers

Children and teenagers spend a significant amount of time asleep, so their mattress should provide appropriate support and comfort as they grow.

A standard UK single is often a practical long-term choice because it can remain useful through childhood and the teenage years.

For bunk beds, high sleepers and cabin beds, however, mattress depth can be particularly important because guard rails need to remain at the appropriate height above the mattress.

Always check the bed manufacturer’s recommended mattress depth before buying.

How Much Should You Spend on a Single Mattress?

There is no magic price that guarantees a better night’s sleep.

Single mattresses range from inexpensive basic models to premium pocket sprung, memory foam and hybrid designs.

Instead of asking, “What is the cheapest single mattress?”, ask:

“What mattress gives me the right support, comfort and durability for my budget?”

A budget mattress can be suitable for a child, occasional guest bed or temporary accommodation.

For an adult using the mattress every night, investing in a better-quality construction may make more sense.

Think about cost over the mattress’s useful life rather than simply the price you pay today.

How to Tell If Your Mattress Needs Replacing

If you’re waking up uncomfortable, don’t automatically blame your pillow or sleeping position.

Your mattress may be part of the problem.

Signs that it may be time for a replacement include:

• Visible sagging
• Permanent dips or impressions
• Damaged or broken springs
• Uneven support
• Persistent discomfort when sleeping
• A mattress that feels significantly less supportive than it used to
• Noticeable deterioration of the cover or materials

If your mattress is visibly worn or no longer provides the support it once did, upgrading may be a more effective solution than simply adding another mattress topper.

Buying a Single Mattress in London: What to Check

Before ordering, run through this simple checklist.

1. Measure the bed

Check the internal sleeping area of the frame or base.

2. Identify the sleeper

Is the mattress for an adult, teenager, child or guest?

3. Consider sleeping position

Side, back and combination sleepers may have different comfort requirements.

4. Choose the right construction

Compare pocket springs, memory foam and hybrid mattresses based on how you sleep rather than choosing purely by trend.

5. Check mattress depth

This is particularly important for bunk beds, cabin beds, high sleepers and trundle beds.

6. Consider the bed base

Your mattress and base work together. Check the mattress manufacturer’s recommendations for suitable support.

7. Look at the full value

Consider quality, warranty, delivery, durability and after-sales support alongside the purchase price.

Why Buy Your Single Mattress From a Local London Bed Retailer?

Buying from a local independent bed retailer can offer an advantage that online comparison tables can’t always provide: personal advice.

Instead of trying to work out which mattress is right from a product description alone, you can discuss your sleeping position, preferred firmness, budget and bed frame with someone who understands mattresses.

A local retailer may also be able to help with:

• Choosing between mattress types
• Matching a mattress to your existing bed
• Finding the correct size
• Arranging London delivery
• Replacing an old mattress
• Selecting a suitable bed and mattress combination

That personal service can be particularly valuable if you’re unsure whether a pocket sprung, memory foam or hybrid mattress is right for you.

Our Advice: Don’t Search for the “Perfect” Mattress

The phrase best single mattress makes it sound as though there is one winner.

In reality, the best mattress is personal.

A side sleeper who likes a softer, cushioned feel may choose something completely different from a back sleeper who prefers a supportive firm surface.

The smartest approach is to identify your requirements first, then compare mattresses that meet them.

If you’re buying in London, also consider the practical details: room dimensions, delivery access, bed-frame measurements and mattress depth.

Get those basics right and you’re already much closer to a better night’s sleep.

FAQs About the Best Single Mattress

What is the best single mattress for adults?

For many adults, a quality medium to medium-firm mattress is a good starting point. The best choice depends on body weight, sleeping position and personal comfort preference. Pocket sprung, memory foam and hybrid mattresses can all be suitable.

What is the standard single mattress size in the UK?

A standard UK single mattress is usually 90cm × 190cm (3ft × 6ft 3in). Always measure your bed frame before purchasing because specialist and imported beds can use different dimensions.

Is a firm mattress better for your back?

Not necessarily. A supportive mattress is more important than simply choosing the firmest option. Back sleepers often benefit from good support, but the appropriate firmness varies between individuals.

Is memory foam or pocket sprung better?

Neither is automatically better. Memory foam tends to offer a more contouring feel, while pocket springs can provide responsiveness and airflow. Hybrid mattresses combine characteristics of different constructions.

What is the best mattress for a side sleeper?

A side sleeper will usually benefit from a mattress that provides pressure relief around the shoulders and hips while maintaining support through the rest of the body.

Can I use a single mattress on any single bed?

Only if the dimensions and mattress requirements match. A standard UK single is generally 90cm × 190cm, but check the frame’s internal dimensions and any mattress-depth restrictions before buying.

How thick should a single mattress be?

There is no single ideal mattress depth. The correct depth depends on its construction, intended use and bed frame. For bunk beds, high sleepers and beds with guard rails, always follow the manufacturer’s maximum mattress-depth recommendation.

Is an expensive single mattress worth it?

Price alone doesn’t determine quality. However, if the mattress is being used every night, investing in suitable materials, support and durability can offer better long-term value than choosing solely on the lowest upfront price.

Ready to Find Your Best Single Mattress in London?

A better night’s sleep starts with the right support.

If you’re looking for a single mattress in London, speak to our team before you buy. Tell us who the mattress is for, how they sleep, what firmness they prefer and which bed frame you’re using.

We’ll help you narrow down the options and find a mattress that fits both your bed and your budget.

Shop our single mattresses today or contact us for , local advice.