The measurements of a king size Sleep+ Mattress are 183.5cm in width x 203cm in length, offering a generous sleep surface with a spacious, cloud-like feel. A king mattress is the largest size available in the Sleep+ Mattress collection, ideal for larger bedrooms and designed for a truly luxurious night’s rest.  

Perfect for individuals who enjoy room to stretch out and unwind, or couples with different sleep schedules, the king size mattress provides ample room to move freely while maintaining individual comfort. 

A king size Sleep+ Mattress is 31cm wider than a queen mattress, while sharing the same length of 203cm. With more space than a queen size mattress, a king size mattress offers added comfort for couples or solo sleepers, and ample room for children or pets to share the bed.

If you’re choosing between a king size mattress and a queen, read our advice page to help you decide which Sleep+ Mattress is right for you.  

A king size Sleep+ Mattress is ideal for those who want maximum space and luxury, perfect for couples or larger bedrooms. When paired with a king size bed, the overall footprint will be slightly larger.  

We recommend a minimum bedroom size of 3.2 x 3.4 metres. This allows comfortable clearance around the bed for movement and bedroom essentials such as bedside tables. A spacious bedroom of around 3.8 x 4.5 metres or more is perfect for a king size Sleep+ Mattress, offering more flexibility in your bedroom layout. 

If you’re searching for the best king size mattress, the King Living Sleep+ Mattress offers customisable comfort, superior support, and lasting durability.  

The king size Sleep+ Mattresses feature reversible, interchangeable layers that let you tailor firmness, softness, and temperature regulation to suit your preferences. As well as being spacious, the king size mattresses promotes airflow and wicks away moisture, creating a cooler, cleaner, and more comfortable sleep environment. 

Whether you’re a side, front, or back sleeper, a luxurious king size Sleep+ Mattress gives you room to move freely and choose your perfect comfort layer, adapting to your personal needs for consistently restorative rest.  

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

At King Living, we offer five king size Sleep+ Mattresses. Explore your options here. 

Follow these simple steps to find your perfect king size mattress:  

• Choose your mattress height 

Select the height that suits your preference. Our king size Sleep+ Mattresses range from 250mm to 385mm. 

• Select your mattress type 

Choose between a modular king size mattress, which allows comfort layer and cover customisation, or a fixed king mattress, designed for simplicity and ease. 

• Decide on your Comfort Layer 

Comfort Layer options for the king size Sleep+ Mattress include Memory, Hybrid, Latex, Dual Hybrid, or Premium Firm layers, each offering a unique feel and level of support. 

• Select your Cover 

Depending on your chosen king size mattress, covers include Airfit®, CoolFit®, WarmFit®, and LuxeFit™, each engineered for a specific sleep experience. 

Once you’ve chosen your preferred combination, simply add your king size Sleep+ Mattress to your cart online, or visit your nearest King Living Showroom for a personalised consultation.