Double Mattresses

What Size is a Double Mattress?

A standard UK double mattress measures 135cm wide by 190cm long, which is approximately 4ft 6in x 6ft 3in. It is designed for one or two sleepers and fits a standard UK double bed frame.

A double mattress is 45cm wider than a single mattress and 15cm narrower than a king size mattress, while a king is also 10cm longer. Always check the dimensions of your existing bed frame before buying, as UK and European mattress sizes can differ.

Double vs Small Double vs King Size Mattresses

The right mattress size depends on how much sleeping space you need and how much room you have available.

• Small double: 120cm × 190cm (4ft × 6ft 3in)
• Double: 135cm × 190cm (4ft 6in × 6ft 3in)
• King size: 150cm × 200cm (5ft × 6ft 6in)

A double provides 15cm more width than a small double, while a king size gives you an additional 15cm of width and 10cm of length. If you're replacing an existing mattress, measure the bed frame before choosing your new size.

What is a 4ft 6 Mattress?

A 4ft 6 mattress is another common name for a standard UK double mattress. It measures approximately 4ft 6in wide by 6ft 3in long, or 135cm x 190cm. You may therefore see double mattresses described as 4ft 6 mattresses, double bed mattresses or simply doubles when shopping online.

What is the Best Double Mattress?

The best double mattress depends on your preferred sleeping position, comfort preference, budget and the type of support you like. Pocket sprung mattresses can provide a responsive feel, memory foam can offer a more cushioning and contouring sensation, while hybrid mattresses combine different technologies.

If you're sharing a double mattress, also consider how the construction responds to movement and whether you and your partner prefer a similar firmness.

Which Type of Double Mattress Should I Choose?

Choosing a double mattress starts with considering the feel and support you prefer. Think about your usual sleeping position, preferred firmness, budget and whether you'll be sharing the mattress with someone else.

Double pocket sprung mattresses

Pocket sprung mattresses contain individual springs within separate fabric pockets. They can provide a responsive feel, with springs reacting more independently to movement. The overall comfort depends on the spring system, comfort layers and firmness, so don't choose based on spring count alone.

Double memory foam mattresses

Memory foam can provide a more cushioning, contouring feel and may suit sleepers who prefer a less springy surface. Different memory foam mattresses have different firmness ratings and constructions, so compare the complete mattress rather than the foam layer alone.

Double hybrid mattresses

Hybrid mattresses combine different technologies, commonly pocket springs with foam comfort layers. They can provide a combination of responsive spring support and cushioning comfort, making them an option for people who want characteristics from more than one mattress type.

Double open coil mattresses

Open coil mattresses use interconnected springs and can be a straightforward option for shoppers looking for a more traditional spring construction. They are available at different price points and firmness ratings, making them worth considering for main bedrooms or guest rooms.

Are Double Mattresses Good for Couples?

A double mattress can be suitable for couples because its 135cm width provides a shared sleeping surface while taking up less space than a king size mattress. If you share a double, consider the mattress construction, firmness and how it responds to movement. If you and your partner prefer different comfort levels, a king size (or super king) zip and link mattress configuration may provide more flexibility.

How Many Pocket Springs does a Double Mattress have?

Pocket sprung double mattresses can contain different numbers of individual springs, depending on the mattress design and construction. Bensons' range includes pocket sprung mattresses with different spring counts, but a higher number of springs does not automatically mean a mattress will feel more supportive or comfortable.

Consider the complete construction, including the spring system, comfort layers and firmness rating, when comparing pocket sprung mattresses.

What Firmness Should a Double Mattress be?

The right firmness for a double mattress depends on your sleeping position, body shape and personal comfort preference. Side sleepers often prefer a little more cushioning around the shoulders and hips, while back and front sleepers may prefer a more stable, supportive feel.

If you're sharing a double mattress, consider both sleepers' preferences before choosing. If you have different firmness preferences, look at mattresses designed to provide a balanced feel and compare the manufacturer's firmness rating, as ratings can vary between brands.

Which Double Mattress is Right for Me?

The right double mattress depends on who will use it, how much space you have and the type of comfort you prefer.

Double mattress for couples

A double mattress provides a shared 135cm-wide sleeping surface and can be a practical choice for couples where bedroom space is limited. If you share your mattress, consider movement transfer, firmness preferences and whether both sleepers are comfortable with the available space.

Double mattress for adults

A double mattress provides more sleeping space than a single and can be suitable for one adult who prefers extra room or for two sleepers. Consider your preferred firmness, mattress type and available bedroom space before choosing.

Double mattress for guest rooms

A double mattress can make a guest room suitable for couples as well as individual visitors. If different people will use the room, consider a versatile comfort feel and a mattress construction that suits a range of preferences.

Double mattress for smaller bedrooms

A double provides more sleeping space than a single while taking up less room than a king size mattress. Measure your bedroom and allow enough space around the bed for movement, furniture and access before choosing a double.

Double mattress for teenagers

A double can give a teenager additional sleeping space and room to grow, provided the bedroom has enough floor space. Consider the mattress firmness, construction and the dimensions of the existing bed frame when choosing.

How much does a double mattress weigh?

The weight of a double mattress varies depending on its construction, materials, thickness and size. Pocket sprung, memory foam and hybrid mattresses can all have different weights, so there is no single weight that applies to every double mattress.

If you're moving a mattress, check the individual product specifications before buying and consider whether you'll need assistance carrying it into position.

How Much Does a Double Mattress Cost?

Double mattress prices vary considerably depending on the construction, materials, brand and features. Budget options are available alongside premium pocket sprung, memory foam and hybrid mattresses.

Rather than choosing on price alone, compare the mattress type, firmness, construction, warranty or guarantee and any included services. This can help you understand what you're getting at different price points.

Double Mattress FAQs

Is a double mattress bigger than a single?

Yes. A standard UK double mattress measures 135cm wide by 190cm long, while a single mattress measures 90cm wide by 190cm long. A double is therefore 45cm wider than a single, while both have the same standard length. The additional width makes a double suitable for couples or for individuals who prefer more sleeping space.

Are double mattresses suitable for teenagers?

Yes, a double mattress can be suitable for a teenager if the bedroom has enough space for the larger bed. A double provides additional sleeping room compared with a single and can be a longer-term option as they grow. When choosing, consider the mattress firmness, construction and the dimensions of the existing bed frame.

Are double mattresses suitable for guest rooms?

Yes, a double mattress can be a practical choice for a guest room, particularly if you want the room to accommodate couples as well as individual guests. Consider a mattress with a versatile comfort feel if different people will use the room. Available space, mattress type, firmness and budget can all help determine the most suitable option.

Are double mattresses suitable for smaller bedrooms?

A double mattress can work well in a smaller bedroom, although you'll need enough space around the bed for access and other furniture. At 135cm wide, a standard double provides more sleeping space than a single while taking up less room than a king size mattress. Measure your bedroom and existing bed frame before choosing.

Are double mattresses suitable for side sleepers?

Double mattresses are suitable for side sleepers, but the most important consideration is the mattress's firmness and comfort layers rather than its size. Side sleepers may prefer some cushioning around the shoulders and hips, while others prefer a firmer feel. Consider different mattress types and firmness ratings to find an option that feels comfortable for your sleeping position.

Are double mattresses suitable for back sleepers?

Yes, a double mattress are suitable for back sleepers. The mattress size does not determine whether it is suitable for a particular sleeping position; firmness and construction are more relevant. Back sleepers may prefer a stable, supportive surface, but comfort is subjective. Compare different firmness ratings and mattress types to find the feel that suits you.

Can you use a double mattress on any double bed frame?

Not necessarily. Although a standard UK double mattress measures 135cm x 190cm, you should check the exact dimensions of both the mattress and bed frame before buying. Some frames may use different sizing or have specific mattress-depth requirements. If you're replacing an existing mattress, measure the sleeping area and check the manufacturer's specifications to ensure compatibility.

Can a double mattress be used on a slatted bed frame?

A double mattress can generally be used on a suitable slatted bed frame, but compatibility depends on the mattress and frame specifications. Check the manufacturer's guidance for the recommended base type and any requirements relating to slat spacing, support or mattress depth. Using the correct base can help ensure the mattress is properly supported and performs as intended.

Can I use a mattress topper on a double mattress?

Yes, a mattress topper can be used on a double mattress to alter the feel of the sleeping surface. Toppers are available in materials such as memory foam and other cushioning fillings, with different thicknesses and comfort levels. Make sure you choose a double-size topper that fits the mattress correctly and consider the combined mattress and topper depth when fitting bedding.

How should I care for a double mattress?

Follow the manufacturer's care instructions, as recommendations vary between mattress types and constructions. Depending on the product, this may include rotating the mattress at recommended intervals, using a suitable bed base and protecting it with an appropriate mattress protector. Avoid bending or folding a mattress unless the manufacturer specifically states that it is designed for this.