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Sealy Mattresses

For over 100 years, Sealy has been one of the world’s leading manufacturers of premium quality mattresses and beds. Each product has been designed with you in mind, aiming to provide you with exceptional comfort and the support you deserve to sleep soundly every night. At MattressNextDay, we’re proud to stock this prestigious brand.

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Trustpilot Star rating

Based on 22,224 reviews

Trustpilot Star rating Verified

Ordered sunday night,delivered monday afternoon.Super comfy mattress.Would use again in a heart beat.

Mark St 18th Apr
Trustpilot Star rating Verified

Good selection of mattress for all size and firmness and price points with option to take old mattress away a little pricey maybe but usefull and a varied delivery time slots to suit. Have used several times and will continue to do so

Gary 18th Apr
Trustpilot Star rating Verified

Sunday delivery was an option which really worked for me and was free, which was a bonus. The communication was really good and they turned up on time. The guys were in and out in 5 mins. The mattress is sooo comfortable and really good value.

Christine 18th Apr

Helpful Guides & Tips for Sealy Mattresses

For over 100 years, Sealy has been one of the world’s leading manufacturers of premium quality mattresses and beds. Each product has been designed with you in mind, aiming to provide you with exceptional comfort and the support you deserve to sleep soundly every night. At MattressNextDay, we’re proud to stock this prestigious brand.

To make sure your mattress meets your individual requirements, you can pick your preferred firmness rating, including soft, medium and firm, and you choose the size you need from our huge range of Sealy mattresses. We stock sizes such as small single, single, small double mattress, double, kingsize mattress and superking, so whether you need a mattress for your spare room or your own boudoir, we’ve got you covered.

Our Sealy mattresses are available with a range of useful and innovative features too. From memory foam filling to posture support, to hypoallergenic qualities, to pressure relief technology, you won’t struggle to find the perfect mattress when you shop from our selection of Sealy products.

Why should I buy a Sealy mattress?

Sealy is a well-known manufacturer of mattresses and beds that people trust, and for very good reason. In fact, they have been making beds for over 100 years, which tells you something about the quality of Sealy beds and the high level of customer service on offer. Their beds provide excellent support and are incredibly comfortable, ensuring you get a restful night's sleep.

Below we explore some common questions about the exciting range of Sealy mattresses and beds to help you choose the right one to meet your needs.

Are there different types of Sealy mattresses?

The good news is that there is a wide range of Sealy mattresses for you to choose from. All of their mattresses are available in a range of sizes from single through to super king size. You then have the choice of memory foam mattresses, Posturepedic, pocket spring and latex mattresses. You can also choose how soft or hard you want your mattress to be, giving you even greater control and ensuring you get the best mattress to suit your physical needs.

What size of mattress is available?

As a rough guide, mattresses start as a small single. The Sealy single mattress is 3’0”x6’3”, a double mattress is 4’6”x6’3" and a king size mattress is 5’0”x6’6”. The super king size measures 6’0”x6’6” and are recommended for people who are over six feet tall.

For more information, read through our mattress size guide.

Can I use a new Sealy mattress on an old base?

Absolutely, there is no rule that says you have to use a new Sealy mattress on a new bed base. However, be sure to carefully check your new mattress size so that it will fit your existing base, and that the base can comfortably support your new mattress. Your existing base should be in good working condition, and remember that if you are purchasing a heavier mattress, check that it can support this additional weight. If your base is old, then it is probably best to get a completely new Sealy bed and mattress.

What's the importance of mattress depth?

Sealy posturepedic mattress come in a range of different depths and so it can be a little confusing knowing what is best for you. Although often overlooked, the depth of a mattress it just as important as the type of mattress. They can range from anywhere between four to 29 inches in depth, with the most popular mattress being six inches thick. What you need to keep in mind is that mattress depth is directly linked to the weight of the person lying on it.

For more information, please read our mattress buying guide.

How do I choose a Sealy mattress for my child?

We have a range of children's mattresses that are all from the Posturepedic range. This is because this type of mattress provides the best support for your child's development. It also gives your child the correct back posture while they sleep. Sealy mattresses blend support with comfort so that your child sleeps well, helping further with their physical development. For best results, buy the mattress and base at the same time. Then for added security choose a padded headboard.

Should I buy a Sealy memory foam or latex mattress?

This comes down to individual preference and need. Both provide the back, neck and joints with support when pressure is applied and then the mattress returns to its original shape when pressure is released. Latex is an elastic material and tends to spring back into shape much quicker than memory foam. Both are incredibly comfortable, but if you want a more responsive mattress, latex is the better option.

Will a Sealy mattress help me if I have a bad back?

All Sealy mattresses offer excellent support to the back and joints. Sealy undertakes constant and innovative research in their mattresses' construction to provide the absolute best support possible. This dedication is shown by the fact they established the OAB (Orthopaedic Advisory Board), a group of orthopaedic surgeons and other medical professionals. So, you know you're in safe hands.

What are posturepedic mattresses?

This type of mattress is constructed from Posturepedic springs. This means that the springs are connected in rows via a coil, and can move independently of each other, resulting in a mattress that sculpts itself to your body, providing excellent support. This mattress differs greatly from the traditional open coil mattress as these springs are not as supportive. The Posturepedic mattress is also recommended for those who are restless sleepers as the mattress helps you to maintain a comfortable sleeping position. The Posturepedic is Sealy's most popular mattress.

Do I need a new Sealy mattress?

Generally speaking, most people aim to change their mattress every 8 to 10 years. However, if you find that your sleeping patterns are disturbed and you are waking up with aches and pains, the time for a new Sealy mattress has come. We offer free, fast delivery to ensure that you get your new mattress promptly, and all our mattresses are handmade in the UK.

When replacing my Sealy mattress, do I need to buy a new base too?

Think of the base of your bed as a shock absorber providing added support and comfort. A mattress and its matching base are designed to work together to give you the most comfortable night's sleep possible. Therefore, when you buy a new mattress, you should get a new bed base too. If you're worried about how you're going to get both a mattress and bed base home, don't worry, we offer 24-hour delivery in the UK. Take a look at our Sealy Divan Bed Sets, where we pair these innovative Sealy mattresses with our range of divan beds, offering you a mattress and divan set to upgrade your bedroom in one.

What is the lifespan of the average Sealy bed?

Your new Sealy Posturepedic divan bed is provided with a 10-year warranty against manufacturing faults. It is advised that you change your mattress every 8 to 10 years, as this is typically their lifespan. You can, however, ensure that you get the longest possible life out of your mattress by choosing the right one to support your body type and sleep/comfort preferences. Don't trust unknown brands or place all of your trust in "bargains", as you could end up having to replace it far sooner, therefore paying more for your bed in the long run. Read our guide to How Long a Mattress Should Last for more information.

What can I expect to spend when buying a new Sealy bed?

When you consider that you spend as much as one-third of your life in bed, the cost of a new mattress from Sealy is extraordinarily affordable. A good night's sleep can also prove to be extremely valuable to your quality of life. You will find that the ranges vary in price from one Sealy bed to the next. It's best to choose a Sealy mattress based on your unique requirements and which mattress has the features to cater to them, instead of basing your decision purely on price.

Have a few more FAQs about Sealy beds and mattresses that don't appear here? Get in touch with us today. 

Size Imperial Metric
Cot Mattress 3'9" x 1'9" 120cm x 60cm
Cot Bed Mattress 4'6" x 2'3" 140cm x 70cm
Adjustable Small Single 2'6" x 6'6" 75cm x 200cm
Adjustable Single 3' x 6'6" 90cm x 200cm
Adjustable Small Double 4' x 6'6" 120cm x 200cm
Adjustable Double 4'6" x 6'6" 135cm x 200cm
Small Single 2'6" x 6'3" 75cm x 190cm
Single 3' x 6'3" 90cm x 190cm
Small Double 4' x 6'3" 120cm x 190cm
Double 4'6" x 6'3" 135cm x 190cm
King Size 5' x 6'6" 150cm x 200cm
Super King 6' x 6'6" 180cm x 200cm
European Small Single 2'8" x 6'6" 80cm x 200cm
European Single 3' x 6'6" 90cm x 200cm
European Double 4'7" x 6'6" 140cm x 200cm
European King Size 5'3" x 6'6" 160cm x 200cm

All mattress sizes given are approximate and stated sizes refer to the sleeping surface only. Mattresses sizes may vary slightly from their stated dimensions due to manufacturing tolerances, please allow +/- 2 inches (5cm).

Support Best for
 Icon for Memory Foam Memory Foam Body moulding and pressure relieving
 Icon for Natural Fibres Natural Fibres Unrivalled comfort, naturally temperature-regulating
 Icon for Latex Latex Breathable, supportive and eco friendly
 Icon for Cool Gel Memory Foam Cool Gel Memory Foam Active cooling properties, ideal for hot sleepers
 Icon for Soft White Fibres Soft White Fibres Hypoallergenic polyester, soft and durable

Support Best for
 Icon for Pocket Springs Pocket Springs Individual springs for tailored support
 Icon for Foam Foam Conforms to your body's shape, silent (no springs)
 Icon for Open Coil Springs Open Coil Springs Traditional, interlinked springs
 Icon for Pocket Springs Latex Bouncy yet supportive, great for hot sleepers

Firmness Best for
Good for side sleepers, a softer level of support
Good all-rounder for front, side or back sleepers
Medium - Firm
Good for people who change sleeping position
Good for people who sleep on their front or back
Extra Firm
The firmest level of support, also known as orthopaedic