Mattress buying guide

Explore mattress types, sizes and firmness options to help you find a mattress that feels right for your sleep preferences.

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Silentnight Airmesh Comfort 3000 Boxtop Mattress on a velvet beige bed.

By Natasha Taggar | Last edited: August 2026

Finding the right mattress doesn’t have to be overwhelming. Explore this guide to learn about different mattress types, key buying tips, and what to consider before you buy.

Mattress sizes and dimensions guide

All our bed and mattress sizes match up - a double mattress will always fit a double bed. But if you're buying for an older bed, there's a chance they might not. Double-check the standard measurements below.

table
Mattress size	Length (cm & ft)	Width (cm & ft)	Ideal for
Shorty (kids') mattress	Length: 175cm / 5ft 9in	Width: 75cm / 2ft 6in	Ideal for growing kids and compact bedrooms.
Single mattress	Length: 190cm / 6ft 3in	Width: 90cm / 3ft	Ideal for solo sleepers and guest rooms.
Small double mattress	Length: 190cm / 6ft 3in	Width: 120cm / 4ft	Ideal for snug couples or solo sleepers in smaller bedrooms.
Double mattress	Length: 190cm / 6ft 3in	Width: 135cm / 4ft 6in	Ideal for average-height couples in medium bedrooms.
King size mattress	Length: 200cm / 6ft 6in	Width: 150cm / 5ft	Ideal for master bedrooms with generous floor space.
Super king mattress	Length: 200cm / 6ft 6in	Width: 180cm / 6ft	Ideal for families, pets, and spacious sleep or for taller couples wanting added stretch space.

Make sure your mattress fits your bed frame

A Habitat ottoman superking size bed in a bedroom.

More than just the mattress size

Before you choose your mattress, remember to consider the size of the bed frame too. The overall dimensions of your bed can take up significantly more floor space than the mattress itself, especially with wider frames, headboards, and footboards. Taking measurements of your room beforehand can help ensure the mattress fits comfortably.

Read our bed size guide

Types of mattresses: a comprehensive guide

Explore the different types of mattresses designed to offer extra support based on your sleep style and needs.

Open coil mattress

The classic sprung mattress, also known as continuous sprung mattresses. Springs are joined together by a coiled wire which spreads your weight across the surface.

They're great for:

Moving and turning easily as they're lightweight.
Single sleepers who have the bed to themselves.

On the flip side:

You may feel your partner moving if you share.
You may roll towards the middle.
They can be less supportive than other styles.

Shop open coil mattresses

Pocket sprung mattress

A pocket sprung design has springs woven into individual pockets, meaning they work individually to provide improved support for your body. In general, a higher spring count can mean a more responsive feel.

They're great for:

Providing more support than coiled mattresses.
Supporting partners of different weights and sizes.
Preventing you from rolling into the middle.

On the flip side:

They can be heavier and harder to turn, requiring two people to lift them.

Shop pocket sprung mattresses

Memory foam mattress

A memory foam mattress doesn't have springs, but is made from a supportive base layer, which is then typically topped with an additional memory foam comfort layer.

They're great for:

Retain their shape with regular care and use.
Distributing body weight evenly but moulding to your shape.
Some memory foam mattresses use hypoallergenic materials for an allergy-conscious choice.

On the flip side:

They can be quite heavy.
They retain heat which can make them warmer than other mattresses.
They tend to have less bounce.

Shop memory foam mattresses

Best picks for maximum comfort and convenience

Whether you're after mattresses for different support needs or looking for easy-to-install mattresses, find the best fit for your comfort and convenience in our collection.

Hybrid mattress

These are specially designed mattresses that combine two or more of the comfort and support features of mattress types. This provides improved support overall.

They're great for:

Providing extra support. Their layered construction may appeal to customers who prefer a firmer, more supportive feel.
Breathability and temperature control. Designed to let air flow through them easily, they're more breathable than memory foam mattresses.

On the flip side:

They tend to be heavier and require two people to move them.

Shop hybrid mattresses

Argos Home Elmdon Sprung Memory Foam Rolled Single Mattress.

Rolled mattress: Delivered in a box

Also known as a bed in a box, a roll-up mattress is delivered rolled for easy transportation.

They're great for:

Being easily transportable and relatively lightweight; so you'll never have to worry about how to get your mattress through the front door. This makes them great for first-time installation in tight spaces.
Providing comfort and support in a convenient rolled format.

On the flip side:

These can't be re-rolled once they have been opened out.

Shop all rolled mattresses

Choosing the right mattress firmness for your sleep style

Wondering what sort of mattress you need? Check the mattress firmness. It ranges from the cushiony soft mattress to the super supportive firm mattress. They refer to how supported you are when you sleep. We know that getting good quality sleep is really important to keep you feeling healthy and happy. Your mattress firmness can influence how comfortable you feel at night. Read on to find the best type for your snoozing style.

Sleeping position vs mattress firmness guide

Use this handy chart as a general guide to compare sleeping positions with mattress firmness levels that may feel most comfortable.

table
Sleeping position	Body type	Mattress firmness
Side sleepers	Smaller or lighter build	Soft to medium-soft
Side sleepers	Average to larger build	Medium to medium-firm
Back sleepers	Most body types	Medium
Front or stomach sleepers	Average build	Medium-firm
Front or stomach sleepers	Larger build	Firm to extra firm

Mattress brands at Argos

Common mattress problems

Looking for a mattress that suits particular comfort needs, such as a firmer feel, hypoallergenic materials or cooling features? Explore our range of mattress types below:

Struggling with back pain?

Some people who prefer extra support choose medium-firm, firm or extra-firm mattresses. Comfort needs vary, especially if you have back pain. Orthopaedic-style mattresses are designed with zoned support areas for a firmer, more structured feel. If you have back pain, consider checking with a medical professional for advice on the most suitable mattress firmness for you.

Do you suffer from any allergies?

Hypoallergenic mattresses may be worth considering if you prefer materials designed to reduce common allergens. Some mattresses may feature antibacterial or anti-allergy treatments designed to help keep the sleep surface fresher. Check individual product details for specific features and consult a medical professional for specific recommendations.

Shop best mattresses for allergies

Get too hot at night?

Cooling gel layer is a new innovation in the mattress market. The top layer is filled with a gel which has a similar feel to memory foam mattresses. They are designed to offer a cooler-feeling sleep surface, which may suit users who tend to feel warm at night.

Keeping your mattress clean

Want your mattress to stay comfy and last longer? A little care goes a long way. From simple steps such as rotating and flipping your mattress, adding protectors and toppers, and regular cleaning - we've got easy tips to help you keep your mattress fresh, clean, and in shipshape for years to come.

Turning your mattress

We recommend you rotate your mattress 180 degrees (on the same side) every 3 - 6 months to increase its life. If you have a double-sided mattress you can also flip it over every year.

Using a mattress protector

We recommend you use a mattress protector from day one to keep your mattress in top condition and extend its life.

Shop mattress protectors

Mattress topper

Add an extra layer of cosiness and support to your mattress. Available in types from breathable microfibre and hollowfibre to comfortable memory foam mattress toppers, these offer great ergonomics while also providing a layer of protection to your mattress.

Shop all mattress toppers

Bush 2-in-1 Corded Stick Vacuum Cleaner.

Vacuum cleaners for mattresses

Vacuum cleaning the mattress regularly is crucial to maintain its quality and lifespan. Use appropriate attachments for the mattress surface in order to avoid damaging it. Trying to get rid of stubborn stains? A spot cleaner is your answer.

Improve your sleep quality

Sleep better at night with our 100 night comfort promise. As mattresses age, they may feel less comfortable or supportive, which can impact sleep quality. Wondering how long mattresses last? Explore our advice on replacing a mattress to know when you might need to upgrade to a new one.

100 night comfort promise

Here at Argos, we want you to get a great night's sleep, and because choosing a mattress shouldn't keep you up all night we're offering a 100 night comfort promise. So if you're not sleeping soundly on your new mattress, you can exchange it within the first 100 days.

Learn more

Man suffering from back pain at home in the bedroom.

When should I replace my mattress?

If your mattress shows signs of wear, such as lumps or dips, or no longer feels comfortable, it may be time to replace it. If you are unsure, Bed Advice UK suggests replacing your mattress every 7 years. By then, it will have been subjected to around 20,000 hours of wear and tear!

Learn more from the Bed Advice UKopens in new tab

Bed and mattress sets

A white Argos Home Lavendon small double end lift ottoman bed in a bedroom.

Bed frames for mattresses

Match your new mattress with a suitable bed frame from our collection. From single to super king, pick the size you need. Choose pops of colour in blue or green or pick timeless neutrals for your sleep sanctuary upgrade. Go for beds with storage to save space. Fancy something convenient? Try bed and mattress sets that come with the mattress included.

Bedroom finishing touches

Good for you, good for the planet

Recycle your old mattress

We can take away your old mattress when we deliver your new one. Our drivers will bring a recycling bag to place over it before we take it away and dispose of it responsibly.

Find out more

Silentnight eco comfort breathe 2000 pillowtop double matt.

Eco-friendly mattresses

Can you make a difference to our planet even while you are asleep? The answer is yes! Our planet-friendly mattresses are made from sustainable fibres and are chemical and foam-free. You'll sleep soundly knowing you've made a sustainable choice.

Shop eco-friendly adult mattresses

Frequently asked questions when choosing a mattress

How do I figure out which mattress is best for me?

When choosing a mattress, a good starting point is to consider your preferred sleeping position. Different mattress firmness levels can feel more comfortable for different sleepers. For e.g.

Side sleepers often find that a softer mattress provides greater comfort and cushioning.
Back sleepers may prefer a medium-firm mattress, which can offer a balanced feel.
Stomach sleepers often choose a firmer mattress for a more supportive sleeping surface.
Other factors, such as personal comfort preferences, body type, and individual sleep needs, can also influence which mattress feels best for you.

How to clean a mattress?

It is recommended to first strip all the bedding including mattress topper and protector before cleaning the mattress. You can start by vacuuming the surface with the right attachment. You can then follow it with a spot cleaner with mild detergent and baking soda to remove stains and deodorise. Remember to let the mattress dry completely before using.

How to get stains out of a mattress?

After vacuuming the mattress, you can use a spot cleaner along with a mild detergent or hydrogen peroxide to remove any stubborn stains. Avoid soaking or wetting the mattress too much as it can result in moulds and lumping.

How often should you change your mattress?

While it is recommended that you change your mattress every 7 to 10 years, it depends on the mattress usage and maintenance. You can look for signs such as sagging, lumps, or discomfort while sleeping to decide when it's time to replace it. Read more about replacing a mattress for more information.

How long do you have to wait before you sleep on a new mattress?

While it depends on individual product or mattress type, manufacturers often suggest waiting for 24-72 hours before using a new mattress to let it fully expand and air out.

What is better: a sprung or foam mattress?

Pocket sprung and memory foam are both great depending on the user. A pocket sprung mattress is ideal for stomach sleepers while a memory foam mattress is better suited for back sleepers and couples as it isolates motions.