A super king size bed is the largest standard bed size in the UK — and for the rooms and households that suit it, there's simply nothing better. At 180cm × 200cm, it gives each of two sharing adults 90cm of personal sleeping width, which is more than a standard single bed. For couples who want genuine independence of movement during sleep, for larger adults who need width as much as length, or for a principal bedroom large enough to carry the scale, a super king is the definitive choice. At Airedale Living, our super king beds are available as standard frames and ottoman storage beds across upholstered and wooden finishes — each one built on a solid frame designed to hold its structure under significant daily use. Browse the full collection above and pair your chosen frame with a super king mattress for a complete sleep setup. Free UK delivery and in-room assembly are included as standard.

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Is a Super King Size Bed Right for You? A Practical Guide

A super king size bed is not the right choice for every household or every room — but when the room and the household both suit it, it's transformative. The questions worth asking before browsing are straightforward.

Does your room have the space? A super king at 180cm wide needs a room of at least 380cm in width to provide 100cm of walkway clearance on each side — the minimum for a principal bedroom to feel uncompromised. In a room of 340–380cm, a super king fits technically but the clearance on each side will be 80cm or less, which can feel tight for a room centred on a very large bed. In rooms below 340cm wide, a king size bed at 150cm × 200cm almost always serves the room better — it provides generous shared sleeping width while leaving comfortable space for wardrobes, circulation, and daily use.

Does your household genuinely benefit from the extra width? A super king gives each of two sharing adults 90cm of sleeping width — the same as a standard single bed each. This matters most for couples where one or both partners move significantly during sleep, for partners who prefer not to be aware of each other's movement, for larger-build adults, or for households where sleep quality is a genuine daily priority rather than a secondary consideration. For couples who sleep close together and rarely disturb each other, the additional 30cm over a king may not produce a meaningful improvement in sleep quality.

What about the mattress? A super king frame requires a super king mattress at 180cm × 200cm — a non-standard size that requires more planning than a double or king. The mattress range at this size is somewhat narrower than at double or king, and bedding (fitted sheets, duvet covers) designed for 180cm × 200cm is a specific purchase rather than an off-the-shelf assumption. Factor both into the total investment when comparing super king against king size.

Super King Size Bed Dimensions: The Complete Size Guide

Standard super king size bed (UK): 180cm wide × 200cm long

This is the definitive UK super king bed dimension. Also known as a 6ft bed (180cm ≈ 6 feet in width). Super king mattresses, fitted sheets, and duvet sets are made for 180cm × 200cm.

Key dimensions to note:

  • A super king is 30cm wider than a king (180cm vs 150cm)
  • A super king is 45cm wider than a double (180cm vs 135cm)
  • A super king is the same length as a king (both 200cm)
  • Each person on a super king has 90cm of sleeping width — more than a standard single (90cm) each

Room planning with a super king size bed:

  • Minimum recommended room width: 340cm (180cm bed + 80cm walkway on each side)
  • Comfortable room width: 380cm+ (180cm bed + 100cm walkway on each side)
  • Minimum room length: 270cm (200cm bed + 70cm clearance at foot)
  • In rooms under 340cm wide, a king size at 150cm is almost always more appropriate

Mattress note: A super king size frame requires a super king mattress at exactly 180cm × 200cm. Do not purchase a king size mattress (150cm × 200cm) for a super king frame — it will be 30cm too narrow. Bedding must also be super king specific: standard king size duvet covers (220cm × 220cm) do not adequately cover a super king mattress (180cm wide requires a 260cm × 220cm super king duvet cover as a minimum).

Super King Storage Beds: Maximum Sleeping Space, Maximum Storage

An ottoman storage super king bed is the most storage-efficient furniture option available for a principal bedroom — and in a master bedroom where wardrobe and floor storage is at a premium, it's one of the most valuable upgrades you can make.

Storage capacity at super king scale. A super king ottoman storage bed (180cm × 200cm external) provides an internal storage compartment of approximately 155–165cm wide × 175–185cm long × 25–30cm deep — typically 600–700 litres of accessible storage. This is substantially more than a king ottoman, and more than most chest of drawers arrangements of comparable cost. For a master bedroom where the principal wardrobe doesn't accommodate spare bedding, seasonal items, or additional storage, the ottoman super king is a single purchase that resolves the problem entirely.

Accessing super king ottoman storage. The gas-assisted lift mechanism on an ottoman super king raises the mattress and base from the foot of the bed, pivoting to reveal the storage compartment. The mechanism is gas-assisted at this scale for good reason — the combined weight of the base, slats, and mattress is significant, and gas assistance ensures the lift is effortless and the open position is fully supported. Plan for 80cm of clearance at the foot of the bed for full access; in rooms where foot clearance is restricted, check the specific lift mechanism on individual product pages as some designs allow side-access variations.

Standard frame vs ottoman at super king scale. The price differential between a standard super king frame and an ottoman super king frame is typically meaningful — but so is what the ottoman eliminates. A three or four-drawer chest of drawers in a principal bedroom costs a comparable amount and provides a fraction of the storage capacity. For most master bedrooms, the ottoman upgrade pays for itself in the furniture and storage solutions it replaces.

Complete Your Bedroom Setup

A super king bed frame performs at its best alongside a correctly specified mattress — 180cm × 200cm. Browse the full super king mattresses collection to find the right firmness, depth, and material. At this size and investment level, the mattress specification is particularly important — a super king frame paired with an inadequate mattress represents a significant missed opportunity.

To compare across the full bed range before committing, the king size beds collection covers the 150cm × 200cm format, and the double beds collection covers the 135cm × 190cm format. The full mattresses collection covers every size and firmness option in one place if you're still comparing across sizes.

Browse our best sellers to see which super king frames our customers choose with the most confidence, or explore new arrivals for the latest additions to the bedroom range. Current offers are available in our sale collection.

Every Airedale Living super king size bed comes with free UK delivery, in-room assembly by our two-person team, a 5-year frame guarantee, and free returns as standard.

Browse the full super king size bed collection above — and furnish your bedroom with the most generous sleeping space available.

Frequently Asked Questions

A standard UK super king size bed measures 180cm wide × 200cm long. It is also commonly referred to as a 6ft bed (180cm ≈ 6 feet in width). This makes it the largest standard bed size in the UK — 30cm wider than a king size (150cm) and 45cm wider than a standard double (135cm). The length of 200cm is the same as a king size. Super king mattresses, fitted sheets, and duvet covers are specifically sized for 180cm × 200cm and are not interchangeable with king size bedding.

A standard UK super king size bed is 180cm wide × 200cm long. The external frame dimensions will be slightly larger than the mattress — typically 185–190cm wide including the frame surround, plus the headboard height projection above the mattress level. Always check individual product pages for exact external frame dimensions when planning room layout and measuring doorway clearance for delivery. The mattress must be 180cm × 200cm specifically — a king size mattress (150cm × 200cm) is 30cm too narrow for a super king frame.

A super king size bed is 180cm wide — also described as 6ft in width. This is 30cm wider than a king size (150cm), 45cm wider than a standard double (135cm), and 90cm wider than a standard single (90cm). For two adults sharing, 180cm provides 90cm of personal sleeping width each — equivalent to a standard single bed each. This is the most generous shared sleeping width in the standard UK bed range.

A super king size bed is 200cm long — the same length as a king size, and 10cm longer than a standard double (190cm). This length comfortably accommodates adults up to around 6ft 4in (193cm) with adequate clearance. The length of a super king and a king are identical — the only dimension that differs between the two sizes is width. If length is the primary concern, a king size bed provides the same 200cm length as a super king at 30cm less width and a more manageable room footprint.

A king size bed measures 150cm × 200cm. A super king size bed measures 180cm × 200cm. The length is identical — both are 200cm. The only difference is width: a super king is 30cm wider than a king, giving each of two sharing adults 90cm of personal sleeping width on a super king versus 75cm each on a king. The super king requires a significantly larger room — plan for at least 380cm of room width for comfortable clearance on both sides, compared to 310cm minimum for a king. For most UK master bedrooms, a king size is the appropriate choice; a super king suits larger dedicated master suites or rooms of 4m+ in width. Both sizes require specific mattresses — a king size mattress (150cm × 200cm) and a super king mattress (180cm × 200cm) are not interchangeable despite sharing the same length. See the king size beds collection to compare directly.