The dimensions of a king single Sleep+ Mattress are 105.5cm in width x 203cm in length, making it a space-efficient design perfect for children or teens’ bedrooms, more compact bedrooms or guest rooms.

When deciding between a king single mattress or a double mattress, the key difference lies in their proportions.

A king single Sleep+ Mattress is approximately 33cm narrower and 13cm longer than a double mattress, making it a preferred choice for taller, solo sleepers, whereas a double mattress is more comfortably suited to two people.

If you’re choosing between a double mattress or king single, read our advice article to help you decide which Sleep+ Mattress is right for you.  

A king single mattress is approximately 13.5 cm wider and 13 cm longer than a standard single or twin mattress. This makes it ideal for older children or teens transitioning from a childhood mattress or who like to stretch out. It’s also an excellent choice for adults seeking a space-efficient solution for compact bedrooms or guest rooms. 

A single or twin mattress, by comparison, is best suited to younger children, smaller bedrooms, or shared rooms where optimising space is essential.

The king single Sleep+ Mattress is the smallest mattress size available at King Living. Investing in a king single Sleep+ Mattress means:

• Reversible, interchangeable king single size layers that allow you to tailor firmness, softness, and temperature regulation, ideal for growing children whose comfort preferences may evolve over time.

• A modular design that promotes airflow for a cooler, cleaner, and more hygienic sleep environment.

• Easy-care maintenance with machine-washable, king single size, top layers.

• A 15-year warranty for peace of mind, and a 120-night mattress trial that ensures the perfect fit. Should comfort needs change, layers can be easily swapped, making the king single Sleep+ Mattress a practical choice as temperatures shift through the seasons, and for developing sleepers. 

Find out why the Sleep+ modular mattress is the best mattress for you in our article. 

A king single Sleep+ Mattress is designed for one person, offering generous length and comfort for side, front, or back sleepers.

For couples or shared sleeping arrangements, a double or queen Sleep+ Mattress is recommended, offering additional space while maintaining a more compact footprint than a king size Sleep+ Mattress.

For further guidance, explore our mattress buying guide.