A double mattress is our most popular mattress size. They're affordable and offer optimal space for couples and growing families. At Mattress Online, you’ll find the perfect double mattress to suit every kind of sleeper across many leading brands such as Silentnight, Emma and Hypnos to choose from.
Your new double mattress comes with a 60-Night Sleep Trial and Free Next Day Delivery to most locations.
Free next working day delivery on most of our mattresses and beds, or upgrade to weekend delivery.
Test your mattress for 60 nights and if you don't like it, simply swap it.
We can collect and recycle your mattress - saving it from landfill.
With hundreds to choose from, we're proud to say that the following are our best selling double mattresses across all budgets.
We want you to be confident in knowing which double mattress will suit your needs. This guide will help you make the perfect choice.
First, let's make sure this size of mattress is right for you. A double mattress gives a sleeping space of 4ft 6in x 6ft 3in / 135cm x 190cm and is ideal if you want to snuggle up with your partner, or if you’re upgrading from a single or small double bed to have the extra space to stretch out.
If you sleep with a partner, you’ll want to consider the temperature regulation properties to sleep cool, the motion transfer properties to not disturb your partner and the general comfort materials to suit your needs.
If you have the space in your bedroom, we do recommend considering a king size mattress as this can give you an extra 15cm (6in) of sleeping space, along with an extra 10cm (3in) in length if you're particularly tall. Over a third of our customers choose a king size or larger mattress[2].
A double mattress can come in many varieties:
And many more!
Continue reading to discover what each of these means and how to match them to your particular needs.
A double mattress is 135cm (4ft 6in) wide x 190 cm (6ft 3in) long and offers a great sleeping space for couples and individuals who like to stretch out. The size is standard across all beds and mattresses made in the UK. So if you have a double bed, a double mattress will fit.
We also offer two slightly different size variations of a UK standard double mattress:
Sometimes you might be unsure what size bed you have. Using a tape measure you can see if it is 135cm wide and 190cm long. If you're measuring your existing mattress, this can vary by around 2cm which is fine.
If you can't find the size of your bed in our listing, then it might be a European sized bed. We do sell European double mattresses as well as other European sizes.
If you're finding it difficult to find a mattress to fit your existing bed, then you may want to consider getting a new double bed at the same time. Or you can read our bed and mattress size guide to find out which mattress size will best fit your bed.
Most beds either come with wooden bed slats or a solid base. Any double mattress from Mattress Online will work perfectly with either type of bed base.
If you do have wooden slats, most manufacturers recommend that the space between the slats should be less than 7.5cm to avoid any sagging through the gaps.
Please see our bed slat guidance to learn more about the maximum gaps between your bed slats specific to each mattress brand.
Generally speaking, the deeper the double mattress, the more luxurious it will be. A popular mattress depth is around 24cm (9.4in) which will give you great support and comfort, going up to as high as 31cm (12.2in) for extra durability and comfort.
Just remember, if you're going for a deeper double mattress, you might want to pair it with an extra deep mattress protector.
You can find the depth of each mattress on each product page.
We're proud to work with the best mattress brands in the UK to give you the perfect range to choose from. If you're unsure which mattress brand to choose or don't have any particular preferences, it can be difficult to know what they offer and why you should choose them.
Silentnight is renowned for exceptional quality with their 75 years of innovation, expertise and experience.
They offer many award winning mattresses with a wide range of Mirapocket®, memory foam, zoned Miracoil® springs and orthopaedic double mattresses. Budget wise, you'll find a premium quality double mattress range priced affordably, as well as many entry level double mattress options.
Hypnos have been perfecting the art of making luxury pocket spring mattresses and beds for over 120 years[3].
As one of the few mattress brands to hold the Royal Warrant of Appointment, Hypnos have been trusted by the world's royalty, VIPs and celebrities.
Hypnos mattresses are some of the most comfortable to sleep on using natural and sustainable materials all sourced in the UK.
Emma takes mattress innovation to the next level with their range of scientifically engineered mattresses[4].
The Emma Original Mattress is award winning earning recognition from Which?, Ideal Homes and Good Housekeeping. With our 100-night sleep trial, you can sleep peacefully on an Emma double mattress from Mattress Online.
These are just a few of the many mattress brands we have in stock and ready for you to choose from.
There are quite a few features to consider when choosing a double mattress. We can simplify this into the support system, comfort layer and additional benefits.
Full memory foam mattresses do not include a spring unit, and memory foam is used for both the support and comfort layers.
The foam uses your natural body heat to mould to your unique body shape while you sleep. This gives you tailored support for your sleeping position, even if you toss and turn in the night.
Gel beads contour to your body shape as you sleep, rather than relying on your body heat like memory foam mattresses.
Gel mattresses also have inherent cooling abilities that draw heat away from your body, helping to keep you at the perfect temperature during the night.
Single-sided mattresses should be rotated once every month and double-sided mattresses should be flipped and rotated every month. This helps to preserve the performance of your mattress for years to come.
When you try a mattress in a store, you are often testing out the firmness of the mattress. However, the feel of the mattress may not mean that you will automatically have a restful and healthy sleep.
Here’s a quick guide to help you make a decision:
We understand that it can be difficult to find the perfect double mattress firmness for you. This is why we offer a free comfort trial on all of our mattresses.
It may take a few weeks to fully feel comfortable on a new mattress, but if after 30 nights it still just doesn’t feel right, let us know and we'll swap it for another mattress free of charge - you just pay the difference if you upgrade to a more expensive mattress. Just remember to use a mattress protector to protect the double mattress during your trial period.
We offer a lot of mattresses at all price points. Whether you want something comfortable and reliable at a great price, or something luxurious and with everything you could dream of, we have just the mattress for you.
A budget double mattress usually starts at around £200. They provide great support and comfort for the price and usually are made from springs or foam. These are a good choice for those who want great value or are looking for a cheap double mattress that's both affordable and reliable.
If comfort is your priority, then around the £400 range you can get some fantastic pocket sprung mattresses with additional comfort layers and fabrics. These mattresses will give you individually zoned support, making them ideal for couples who don't want to disturb each other at night.
Our premium mattresses will take your comfort to the next level. You'll find more advanced support systems and additional comfort layers using natural materials. These mattresses combine luxury comfort with support that will enhance the quality of your sleep. Our premium mattresses can range anywhere between £600 to £1,200.
Finally, we come to our most luxurious and prestigious double mattresses. These make no compromises, providing you with the best targeted support, luxurious fillings, and premium materials. The craftsmanship of these mattresses is unmatched and you'll consider this mattress a real investment into the most healthy sleep you can get.
Mattress Online is among the largest stockholders of double mattresses in the UK. We work very closely with our manufacturers to offer you the best possible price. Check out our double mattress sale for the latest deals and offers on your next double mattress.
Generally speaking, a healthy life span of a double mattress is between 6 and 8 years, but some people choose to replace them earlier. This could be because they start to notice how stiff or achy they feel when they wake up in the morning, or they struggle to stay asleep due to the feel of their mattress.
Mattresses do degrade in performance over time, especially if they haven't been rotated every couple of months to even out the wear and tear on the mattress. In addition, mattresses accumulate debris from our sweat and skin cells, which means the environment we sleep in isn't as fresh and healthy as it could be.
A double mattress is designed to last for many years, but we recommend replacing it every 7 years to ensure a healthy and optimal sleeping environment.
At Mattress Online, you'll find our mattresses have a manufacturer supported warranty or guarantee ranging between 5 years to 15 years.
As with all products, following the care recommendations will improve the longevity of your new double mattress.
If you decide to buy a new double mattress with us here at Mattress Online, you can opt into our mattress recycling service for £35. This fee is non-profit and covers the costs of transporting your mattress and the recycling facility charges.
This prevents your old mattress from going to landfill and ensures that your mattress components are reused responsibly and sustainably.
We've been selling our double mattress range at Mattress Online for over 20 years, so we know how to get them to you quickly and carefully. We stockhold hundreds of different product ranges so you can be sleeping on your new mattress as quickly as tomorrow.
All our mattresses come with free week-day delivery on a day of your choice to most locations within the mainland UK. You can choose to upgrade to premium delivery on any of our mattresses where they'll be delivered to a room of your choice. We also offer weekend delivery.
Please refer to our delivery information for specific details about our delivery services, any associated fees, longer delivery times and areas we are unable to deliver to.
Recycling your old mattress with Mattress Online is extremely simple. You can upgrade to this service when you checkout and we’ll collect your old mattress when we deliver your new one... Please refer to our mattress recycling information for the latest pricing details.
All of our mattresses come with a free 60 night comfort trial. If for any reason you don't like sleeping on your new double mattress, you can swap it for another one after 30 days in-line with our terms and conditions.
Please read our 60 Night Comfort Trial for further details.
If you're looking for more double mattress information, read our Double Mattress FAQs. We explain everything from the different double mattress sizes, to the weights, depth and bedding you should consider before you purchase.
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