Remember that feeling when you first get to a posh hotel and jump into the luxury king size bed? There's nothing quite like it - the bed feeling as big as a swimming pool and comfy as a cotton wool cloud! That's why, if you have the space in your bedroom, it's worth investing in your own king size mattress.

How big is a king size mattress?

The first thing you'll need to consider when opting for a king size mattress and bed is whether or not your room has the space. A king-size mattress is 5ft (or 150cm) wide, granting you an incredible amount of space to move around in. This makes them perfect for couples as both sleepers can choose their sleeping position without having to worry about affecting the other person. When measuring, make sure you take into account the width of your bedframe too as this can often be a little wider than the 5ft mattress.

Why choose a king size mattress?

• Space - As mentioned, space is the ultimate reason you should choose a king size bed. Whether that's for luxury purposes or because you find you struggle to sleep well on a smaller mattress.
• Variety - Because they're so popular, king size mattresses come in a variety of designs from memory foam to traditional spring to natural. It's often a little difficult to understand the wide array of options and what will suit you best - that's why we've put together a quick guide to finding the best king size mattress below.

What are the different types of king size mattress?

In general, there are three main types of mattress; pocket spring, traditional spring, and memory foam. Most bed and mattress manufacturers make all three types, but there may be differences in the manufacturing process and cost.

Pocket spring mattresses are currently the most popular type of mattress available. Providing great support, pocket spring mattresses are not as warm as some other types, allowing you to keep cool during the night. Each spring is independent, meaning the mattress responds perfectly to your sleep position and movement.

Traditional spring mattresses are usually the cheapest, making them great for those on a budget. Don't think this means they lack quality either. They're often handtufted and feature edging to prevent fall-out. They're popular for those who struggle with back-ache and sleep related pains. That's because they're frequently available in medium to very firm comfort levels. This means they have good back alignment properties, perfect for those who need spinal support.

Memory foam mattresses have been popular for a while now. That's because they feature advanced technology designed to maximise your sleep experience. On contact with your body, the mattress will soften and respond to your sleep position. This makes these mattresses great for keeping you comfortable all night long, helping with a variety of sleep related health issues.

Outside of the three main king size mattress types, there's also plenty of options for more bespoke designs. These range from natural, designed with the environment in mind, to zip-and-link, which can be split in half, allowing for different comfort levels on either side.

Choosing a king-size bed is an important investment - one that's going to last for years. That's why we want to make sure you get the very best. Dreams 40-night guarantee gives you the option to swap your mattress if after 30 days you're not quite convinced.

For more information see our bed and mattress guide or speak to one of our Sleep Advisors on 0800 652 5090.