King Size vs Super King Mattress UK: Size Comparison Guide

Choosing Between King and Super King

Upgrading to a larger mattress is one of the best investments couples can make for their sleep. But should you go King or Super King? This guide breaks down the differences to help you decide.

UK Mattress Sizes Explained

King Size (150 x 200cm)

Pros

• Fits most bedrooms: Standard master bedrooms typically accommodate a King
• Good space per person: 75cm each — more than a single bed (90cm solo)
• Easier logistics: Fits through most doorways and staircases
• More bedding choices: Wider availability of sheets and duvets
• Lower cost: Less material means lower price than Super King

Cons

• Still feels cosy: Large partners may still feel cramped
• Not ideal for restless sleepers: More chance of disturbance

Best For

• Average-sized couples
• Standard master bedrooms
• Those upgrading from a double

Super King (180 x 200cm)

Pros

• Maximum space: 90cm each — like having your own single bed
• Minimal disturbance: Partner movements less likely to affect you
• Luxury feel: Hotel-suite experience at home
• Great for families: Room for kids or pets occasionally
• Future-proof: You won't wish you'd gone bigger

Cons

• Room requirements: Needs a large bedroom (minimum 4m x 3.5m recommended)
• Logistics: May not fit through narrow doorways or stairs
• Higher cost: 20% larger means higher price
• Bedding cost: Super King bedding typically costs more

Best For

• Larger couples
• Restless sleepers
• Those with spacious bedrooms
• Anyone who prioritises sleep space

Room Size Requirements

King Size Room

Minimum room: 3.5m x 3m

Comfortable room: 4m x 3.5m

Allows for: Bed, bedside tables, wardrobe, movement space

Super King Room

Minimum room: 4m x 3.5m

Comfortable room: 4.5m x 4m

Allows for: Bed, bedside tables, wardrobe, dressing area

Getting It Into Your Home

Doorways

• Standard UK doorway: 76cm wide
• King mattress: Usually fits through standard doorways
• Super King: May need doorframe removal or alternative access

Stairs

• King: Usually manageable with standard UK staircases
• Super King: Can be challenging in terraced houses or flats

Solution: Rolled Mattresses

Our mattresses arrive rolled and boxed, eliminating delivery concerns. Both King and Super King fit easily through doorways when rolled.

Cost Comparison

Super King typically costs 15-25% more than King for the same model:

• More materials required
• More foam, more springs
• Larger cover fabric

However, cost per cm² of sleeping space is actually similar.

Bedding Considerations

• Super King bedding is less commonly stocked in shops
• Online availability is good for both sizes
• Consider ongoing bedding costs when choosing size

Our Recommendation

Choose Super King if:

• Your room can accommodate it
• Either partner is tall, large, or restless
• You have the budget

Choose King if:

• Your bedroom is average-sized
• Budget is a concern
• You're upgrading from a double and want significant improvement

Both sizes are available across our Nexa range: Browse our King and Super King mattresses