6ft Super King Mattresses

6ft Super King Mattresses: The Ultimate Buying Guide

A 6ft super king mattress provides one of the most generous standard UK sleeping surfaces, making it particularly well suited to couples who value personal space. Measuring approximately 6ft x 6ft6 (183cm x 200cm), it provides the same length as a king size mattress but approximately 30cm of additional width.

With a mattress this large, the internal construction becomes particularly important. Spring systems, comfort fillings, firmness, edge support, mattress weight and the bed base underneath can all influence the finished sleeping experience. Understanding these features can help you compare super king mattresses on more than size or headline specifications alone.

1. Super King Mattress Dimensions

A standard UK super king mattress measures approximately 6ft x 6ft6 (183cm x 200cm).

These dimensions refer to the mattress rather than the complete bed. A divan base generally follows the mattress footprint relatively closely, whereas an upholstered, wooden or metal bedstead may be considerably larger because of its side rails, headboard and footboard.

For an existing bed, measure the internal mattress area. When choosing a completely new bed, use its full external dimensions when planning your bedroom layout.

2. Comparing Super King with King and Double

A 5ft King Size Mattress measures approximately 5ft x 6ft6 (153cm x 200cm), compared with 6ft x 6ft6 (183cm x 200cm) for a super king.

Both are approximately the same length, but the super king provides around 30cm of additional width. This extra space can make a substantial difference when two people regularly share a bed.

Compared with a 4ft6 Double Mattress at approximately 4ft6 x 6ft3 (137cm x 190cm), the difference is even greater. A super king provides around 46cm of additional width as well as 10cm of extra length.

3. Understanding Mattress Firmness

Firmness describes the sensation of the sleeping surface rather than simply how supportive the mattress is. A substantial supporting spring system can be combined with soft comfort layers, allowing a mattress to provide underlying support while retaining a cushioned surface.

Our range includes Soft Mattresses, Medium Mattresses, Medium-Firm Mattresses and Firm Mattresses.

• Soft: Greater cushioning with more initial sink into the comfort layers.
• Medium: A balance between cushioning and a supportive sensation.
• Medium-Firm: A more supportive feel while retaining noticeable cushioning.
• Firm: A more solid sleeping surface with less initial sink.

Firmness remains subjective. Body weight, sleeping position, mattress construction and the base underneath can all influence how the same mattress feels to different sleepers.

4. Pocket Sprung Super King Mattresses

Pocket Sprung Mattresses contain individual springs enclosed within separate fabric pockets. This allows different areas of the mattress to respond more independently to pressure.

Independent spring movement can be particularly relevant across the generous width of a super king mattress. Each sleeper applies pressure differently, and pocket springs allow different areas of the mattress to react more individually.

Spring count shouldn't be viewed as a measure of quality on its own. Spring design, wire gauge, zoning, upholstery and the comfort layers above the springs all contribute to the finished mattress.

5. Memory Foam and Foam Comfort Layers

Memory Foam Mattresses use pressure-responsive foam designed to contour around the body.

Memory foam can be used within an all-foam mattress or combined with a sprung support system. Different foam depths and densities can create very different sleeping characteristics, so the presence of memory foam doesn't determine the firmness of a mattress by itself.

Other specialist foams may be designed to provide quicker response, additional airflow or different levels of cushioning, making the complete comfort-layer construction worth comparing.

6. Hybrid Super King Mattresses

Hybrid Mattresses combine different mattress technologies within one construction, commonly pairing pocket springs with memory foam, gel foam or other specialist comfort materials.

This can combine the responsive qualities of springs with the cushioning and contouring characteristics associated with foam.

Hybrid is a broad mattress category rather than a particular specification. Spring systems, foam types, layer depths and firmness can vary considerably, so two hybrid mattresses may provide very different sleeping experiences.

7. Cooling and Temperature Management

Mattress manufacturers use different materials and construction methods intended to encourage airflow and manage sleeping temperature.

Cool Gel Mattresses can incorporate gel-infused or specialist cooling comfort layers, often alongside foam or pocket springs.

Other mattresses may use breathable covers, ventilated foams, open-cell structures or natural fibres. Cooling technologies vary between manufacturers, so consider how the complete mattress is constructed rather than relying on one cooling feature.

8. Natural Mattress Fillings

Natural Mattresses can incorporate materials such as wool, cotton and other natural fibres within their upholstery.

These fillings are frequently combined with pocket springs to create traditionally upholstered mattresses and can provide breathable layers of cushioning above the spring system.

The amount and type of natural content varies considerably between products, so check the individual specification if natural fillings are an important part of your mattress choice.

9. Orthopaedic and Firmer Mattress Designs

Orthopaedic Mattresses are generally associated with a firmer, more supportive sleeping sensation.

Orthopaedic isn't one particular mattress construction. Different models can use open coil springs, pocket springs, foam or combinations of materials, so the term should be considered alongside the actual firmness and complete construction.

A firmer mattress also isn't automatically the right choice for every sleeper. Comfort remains individual and should be considered alongside the underlying support system.

10. Rolled Super King Mattresses

Rolled Mattresses are compressed and rolled to make transportation and handling more convenient.

Rolled packaging isn't limited to basic foam mattresses. Depending on their construction, some pocket sprung and hybrid mattresses can also be compressed for delivery.

This can be particularly useful with a super king because a full-size mattress is a substantial item to manoeuvre. Once unpacked, allow a rolled mattress to expand according to the manufacturer's instructions.

11. Sleeping Space for Couples

The main advantage of moving from a king to a super king is the additional sleeping width. At approximately 183cm wide, a super king provides around 30cm more width than a king size mattress.

This gives each sleeper a more generous individual area and can be particularly useful for couples who move frequently during the night or simply prefer more personal space.

Size doesn't replace the need to choose a suitable mattress construction, however. Firmness, pressure response, spring movement and comfort fillings still determine much of the actual sleeping experience.

12. Independent Support and Movement

When two people share a mattress, movement on one side can potentially be felt by the other sleeper.

Pocket spring systems allow individual springs to respond more independently than interconnected springs, while some foam comfort materials can also absorb movement.

Across a super king sleeping surface, these characteristics can help different areas of the mattress respond more individually to each sleeper.

13. Edge Support and the Usable Sleeping Area

Some super king mattresses incorporate reinforced perimeter springs, firmer foam borders or specialist edge-support systems.

A more stable perimeter can help make greater use of the full width of the mattress and provide a firmer sensation when sitting or sleeping towards the edge.

Edge construction varies between products, so check the individual mattress specification if reinforced edge support is an important feature for you.

14. Mattress Depth and Overall Bed Height

Super king mattresses are available in many different depths depending on their internal construction.

Deeper mattresses may accommodate substantial spring systems and multiple comfort layers, but mattress depth alone isn't an indication of quality. The materials inside the mattress and how those layers work together are more important.

Depth also affects the finished height of the bed. A deep super king mattress combined with a tall divan base can create a particularly high sleeping surface and may cover more of the visible area of a headboard.

15. The Bed Base and Mattress Feel

The base underneath a mattress forms part of the overall sleeping system and can influence the finished feel.

• Platform-top divans provide a stable, firm supporting surface.
• Sprung divan bases introduce an additional layer of cushioning and responsiveness.
• Sprung slats provide some flexibility beneath the mattress.
• Solid slats generally provide a firmer supporting surface.

The same super king mattress can therefore feel slightly different depending on the base underneath it.

16. Super King Mattresses and Ottoman Beds

A super king mattress can be used on a compatible super king ottoman bed, but mattress weight is an important consideration.

Ottoman beds use gas-lift pistons to assist with raising the mattress platform. Super king pocket sprung and hybrid mattresses can be particularly substantial, and the lifting mechanism must be suitable for the mattress being used.

Always compare the mattress weight with the requirements of the individual ottoman bed before ordering.

17. Slatted Bed Frames and Centre Support

When using a super king mattress on a slatted bed frame, check the mattress manufacturer's requirements for the maximum spacing between the slats.

Gaps that are too wide may not provide suitable support for certain foam and pocket sprung mattresses.

The central support structure of the bed is also particularly important across a 6ft-wide sleeping surface. The bed frame should be assembled correctly with all specified centre rails, support legs and other components in place.

18. Single-Sided and Double-Sided Mattresses

Single-sided mattresses have one sleeping surface and generally require rotation from head to foot rather than turning over.

Double-sided mattresses have usable upholstery on both sides and can normally be turned as well as rotated.

A super king mattress can be large and heavy, particularly when it contains substantial pocket spring units and deep upholstery. Follow the manufacturer's care and handling instructions and use the mattress handles only as directed.

19. Access and Handling

Access deserves additional consideration with a super king mattress because of its overall size. A flat mattress measuring approximately 183cm x 200cm can be difficult to manoeuvre around tight staircases, low ceilings, narrow landings and sharp turns.

Measure the complete delivery route rather than simply checking the bedroom doorway. Rolled mattresses can provide easier access where suitable, but not every super king mattress is available in a rolled format.

Mattresses should be handled in accordance with the manufacturer's instructions and shouldn't be bent or folded simply to force them through restricted access.

20. Measuring for a Super King Mattress

A standard UK super king mattress measures approximately 6ft x 6ft6 (183cm x 200cm).

When replacing a mattress, measure the internal sleeping area of the existing bed rather than its external frame. Imported, specialist and older beds may not necessarily use standard UK mattress dimensions.

For a new bed, allow for the complete external dimensions as well as the mattress. Upholstered and wooden bedsteads can be significantly wider and longer than their 6ft x 6ft6 sleeping area.

21. Mattress Care and Long-Term Performance

A super king mattress should be used on a suitable supportive base and maintained according to the manufacturer's instructions.

A mattress protector can help protect the sleeping surface, while turning or rotating the mattress where required can encourage more even settlement and wear.

When comparing super king mattresses, consider the support system, firmness, comfort fillings, upholstery and complete construction together. Spring count, mattress depth or one particular filling can provide useful information, but none should be considered in isolation.