King Single Mattresses

Key features to consider when buying a king single mattress

A king single mattress is a smart choice when you’re looking for something that balances space-saving design with extra room to stretch out. Larger than a standard single, yet smaller than a double, a mattress in the king single size offers versatility that suits many homes and lifestyles. A single size is approximately 92 x 188cm, and a king single is approximately 107 x 203cm.

When shopping for the right king single bed mattress, consider the type of support and comfort you prefer. If you like a cushioned feel that contours to your body, a memory foam mattress could be ideal. For a more traditional option, explore our innerspring mattresses, known for their durability and bounce. You can also enjoy the best of both worlds with a pocket spring mattress, which offers targeted support and reduces motion transfer, great for light sleepers.

Size and thickness matter, too. Thicker mattresses often offer more support, especially for older children or adults. And if convenience is a priority, don’t miss our range of mattress in a box options, delivered straight to your door and easy to unbox at home.

Benefits of a king single mattress for different sleepers

Whether you're furnishing a kid’s room, setting up a guest space, or upgrading from a standard single, a king single mattress is a practical and comfortable solution. Its generous width and length make it suitable for both children and adults, providing plenty of room to sleep soundly without dominating the room.

This size is especially great for solo sleepers who value space to move. For kids transitioning from a cot or toddler bed, it offers long-term value as you won’t need to upsize again for many years. And in guest bedrooms, it strikes the perfect balance between comfort and efficient use of floor space.

Need a matching base? Our collection of king single beds is designed to complement any king single mattress and support a cohesive look in your space.

How to care for your king single mattress

To keep your king single mattress feeling fresh and supportive for years, a little maintenance goes a long way. Start with a quality mattress protector to shield against spills, allergens, and dust. Rotate your mattress every few months to help prevent uneven wear, especially if it’s used nightly.

If you've chosen a memory foam or pocket spring mattress, double-check the manufacturer’s care instructions, as some materials benefit from less movement than others. Vacuum the surface occasionally, and air the mattress out when changing sheets to promote ventilation and reduce moisture build-up.

King single mattresses for growing children and teens

A king single bed mattress is the ideal companion for growing kids and teenagers. It offers that little bit of extra length and width, which is perfect as they grow, both in height and in their need for a better night’s sleep. Plus, it gives them the independence of their own “grown-up” bed without taking over their room.

When choosing a mattress in a king single size for kids, comfort and support should be your top priorities. Look for breathable materials, minimal motion transfer, and medium firmness to support healthy sleep posture. Our full mattress range includes family-friendly options that tick all the boxes.

Materials and construction of king single mattresses

Not all king single mattresses are made equal, and understanding what’s inside can help you find the right fit for your needs. If comfort is your top priority, memory foam is a popular choice for its body-contouring feel. If you need more structure and bounce, innerspring and pocket spring constructions are known for their reliable support and responsiveness.

Our innerspring mattresses are built with a classic coil system that suits sleepers who prefer a firmer feel. If you're looking for motion isolation (particularly helpful if you’re a restless sleeper), our pocket spring mattress range provides excellent targeted support.

Want a no-fuss delivery option? Explore our mattress in a box collection, which offers mattresses that are compressed and rolled for easy setup, without compromising on comfort or quality.

FAQ

What size is a king single mattress?

A king single mattress typically measures 203cm long by 107cm wide, longer and wider than a standard single, offering extra room without taking up too much extra space.

Is a king single mattress suitable for adults?

Absolutely. It’s a great option for solo adult sleepers, especially in smaller bedrooms or guest rooms where a double or queen might feel too large.

How do I know which mattress type to choose?

Start with how you sleep, if you prefer a softer, sink-in feel, memory foam might be for you. If you like more bounce and support, innerspring or pocket spring mattresses are worth considering.

Whether you're setting up a new bedroom or upgrading your child’s sleep setup, a king single mattress is a smart and stylish choice. Browse our full mattress collection today and find the perfect fit for your space, sleep style, and budget.