King Size Mattresses

Spacious and luxurious king size mattresses

Experience the space, comfort, and support of a king size mattress andfind the perfect mattress for you. Whether you prefer memory foam, pocket springs, or a hybrid version. Our king size mattresses are a generous option for your bedroom, ensuring you enjoy a restful sleep each night.

How big is a king size mattress?

A standard UK king size mattress measures 150cm wide by 200cm long, or roughly 5 feet by 6 feet 6 inches. This size offers additional width and length compared to a double, creating a noticeably more spacious sleeping space.

How much bigger is a king size mattress than a double mattress?

A double mattress measures around 135cm by 190cm, so you get much more room to stretch and spread out with a king size mattress.

If you have the room, you can also look at our super king size mattresses, which are approximately 180cm by 200cm.

The king size mattress sits comfortably in between these two sizes, large enough to feel indulgent, yet versatile enough to suit most bedrooms.

Is my bedroom big enough for a king size mattress?

Before purchasing a king size mattress, it’s important to make sure your bedroom is big enough for it to fit comfortably. We recommend leaving at least half a metre of space around the bed, so you can move around easily and keep the room feeling open. This also leaves enough room for you to open your chest of drawers and wardrobes easily.

Memory foam king size mattresses

Our memory foam king-size mattresses contour perfectly to your body’s natural shape, distributing weight evenly and relieving pressure on joints. This adaptive support makes them a great choice if you prefer a softer, cocooning feel. Memory foam mattresses are also ideal if you share a bed with a partner, as movement on one side is barely felt on the other.

Pocket spring king size mattresses

Our pocket spring king size mattresses offer great breathability to help keep you cool at night. Each spring is individually wrapped so it can move independently and adapt to your body’s sleeping position.

Soft, medium, and firm king size mattresses

The firmness of your mattress also has an impact on how well you sleep.

A soft mattress offers a plush, cushioned feel, making it ideal for lighter sleepers and those who prefer to sink gently into the surface.

A medium mattress strikes a balance between comfort and support, catering to most body types and sleeping positions.

For those who require extra support, particularly back and stomach sleepers, a firm mattress provides the stability needed to maintain a healthy spinal alignment.

If you and your partner have different preferences, a medium or medium-firm king size mattress is often the best compromise, providing comfort and support in equal measure.

Which king size mattress is best for my sleeping position?

Every sleeper has unique needs, and the right king size mattress can enhance comfort and posture for your preferred position. Discover more about finding the right mattress for you over on our blog.

Side sleepers often benefit from a softer or medium mattress that cushions the shoulders and hips while keeping the spine aligned.

If you sleep on your back, a medium-firm surface will support the natural curve of your spine and prevent lower back strain.

Stomach sleepers tend to sleep best on a firmer mattress that stops you from sinking in too deeply, helping to maintain a balanced posture.

If you don’t have a fixed sleeping position and move around throughout the night, a medium mattress could be your best bet for flexibility and consistent comfort across every position.

Best bed frames for king size mattresses

Explore our king size bed frames which go with your king size mattress.

Our king size mattresses pair well with slatted frames and ottoman beds, giving you the freedom to choose a style that suits both your level of comfort and your bedroom design. An ottoman bed provides generous hidden storage beneath the mattress, ideal for keeping your bedroom neat and clutter-free.

Discover our wooden and upholstered king-size beds, available in a range of styles to complement your bedroom interior, as well as coordinating bedroom furniture.

How to care for your king size mattress

Using a washable mattress protector helps to prevent stains and dust from building up on your mattress. Also consider rotating your mattress every three months, so it wears evenly to prevent sagging and lumps from appearing. If your mattress is double-sided, you can even flip it.

Whenever possible, allow your mattress to air out while changing your bedding. This keeps it clean, hygienic, and comfortable for years to come.

How long does a king size mattress last?

With proper care, a high-quality king size mattress can last between 7-10 years. The lifespan will depend on the materials and how well it’s maintained.

Premium pocket spring and memory foam mattresses tend to offer the longest life, maintaining their shape and comfort far longer than alternatives.