King Mattresses
Upgrade to a king size mattress, measuring 150cm x 200cm (5ft x 6ft 6"). They’re ideal for couples, taller sleepers, or anyone who simply loves to stretch out.
15.4k+ reviews
Checkout using your account
Checkout as a new customer
Creating an account has many benefits:
- See order and shipping status
- Track order history
- Check out faster
What Size is a King Size Mattress?
A UK king size mattress measures 150cm wide by 200cm long (5ft x 6ft 6"). This makes it 15cm wider and 10cm longer than a double mattress, providing noticeably more sleeping space for couples or solo sleepers who prefer room to move. If you need even more space, consider our super king mattresses at 180cm x 200cm. Read our mattress size guide for more help and advice.
Will a King Size Mattress Fit My Bed Frame?
A king size mattress fits any standard UK king size bed frame, whether it's a divan, ottoman, or bedstead. Always check your bed frame's internal dimensions match 150cm x 200cm before ordering. Keep in mind that the bed frame itself may be slightly larger, depending on its style, so measure your bedroom space accordingly. We recommend leaving at least 60cm clearance on each side for easy access.
Who Should Choose a King Size Mattress?
King size mattresses suit couples who want personal sleeping space without disturbing each other, individuals over 6ft tall who need extra legroom, restless sleepers who move around at night, and families where children or pets occasionally join in. If you're upgrading from a double, the extra 15cm width makes a real difference to comfort.
What Types of King Size Mattresses Do You Offer?
We have a king size mattress in every comfort type to suit how you sleep:
- Memory Foam - Contours to your body shape for pressure relief and minimal motion transfer, ideal for couples and those with joint pain.
- Pocket Sprung - Individually wrapped springs respond independently to movement, providing targeted support and reducing partner disturbance.
- Open Coil - Traditional interconnected spring system offering reliable support at a budget-friendly price.
- Hybrid - Combines memory foam comfort layers with pocket spring support for the best of both worlds.
- Latex - Naturally breathable and responsive with a cooler sleep surface, great for hot sleepers.
- Gel - Infused with cooling gel particles to regulate temperature throughout the night.
- Orthopaedic - Firmer construction designed to promote proper spinal alignment, particularly suited to back sleepers and those with back pain.
- Eco-Friendly - Made from sustainable and natural materials for comfort without compromising on environmental responsibility.
Our mattress buying guide gives you even more advice on finding your perfect type.
Which Firmness Level is Right for You?
The right firmness depends on your sleeping position and personal preference. Here's a quick guide:
- Soft - Best for side sleepers who need cushioning around shoulders and hips; provides gentle contouring and pressure point relief.
- Medium Firm - Suits most sleepers and sleeping positions; balances cushioning comfort with supportive structure to maintain spinal alignment.
- Firm - Ideal for back sleepers, front sleepers, and those with lower back pain; offers a stable surface with minimal sinkage.
Not sure which firmness to choose? As a general rule, side sleepers tend to prefer softer mattresses, back sleepers suit medium-firm, and front sleepers often need firmer support. Your body weight also plays a role - heavier sleepers typically benefit from firmer options.
Do You Offer Free Delivery on King Size Mattresses?
Yes, all our king size mattresses include free UK delivery to most areas in England, Scotland, and Wales. Many of our mattresses arrive rolled and vacuum-packed for easier handling through doorways and up stairs. We also offer 0% APR finance on approved credit, helping you spread the cost of your perfect night's sleep.
Do you have more queries about our king size mattresses? If so, don’t hesitate to ask. Our contact form is a great way to get in touch with our experts.