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Sleep Talk Blog, Bed and Mattress Guides

The Pros and Cons of upgrading to a King-Size Bed

Posted on 15 May 20231 May 2026 by Antony
The Pros and Cons of upgrading to a King-Size Bed
15
May

Upgrading to a King-Size Bed

Upgrading from a double to a king-size bed gives you a sleeping space that is 15cm wider and 10cm longer. In other words, king-size beds give you around 10% more sleeping space without taking up significantly more floor space.

15cm more width and 10cm more length make a noticeable difference when you have young children or a partner who hogs the bed. However, before jumping the gun and upgrading, there are several things to consider.

This article reveals the pros and cons of upgrading to a king-size bed.

Let’s jump in!

Pros of Upgrading to a King-Size Bed

More sleeping space

King-size beds give you approximately 10% more sleeping space than doubles. This allows for more space to move around and more comfortable sleeping positions without requiring significantly more space in the bedroom.

Comfort

King-size beds are comfortable for couples and are great for spreading out. You are unlikely to kick or touch your partner unless you are snuggling together, making a king-size bed a top choice if you value personal space.

Better sleep quality

King-size beds provide more room for comfortable sleeping positions, leading to better sleep quality. For example, you might spread out on your back or sleep horizontally across the mattress, and a king-size bed is perfect for this.

Enhanced motion isolation

If you have a heavy partner or one of you tosses and turns a lot, you want a mattress that absorbs energy to reduce motion transfer. King-size mattresses are better than doubles because they increase the distance between you.

Increased storage

King-size beds often come with built-in storage solutions like drawers or shelves, which can be handy for storing extra pillowcases, blankets, and other bedding. King-size frames usually have more drawers or a larger ottoman space than doubles.

Great for families

If you have young children who crawl into bed with you in the morning or co-sleep with a baby sometimes, a king-size bed is ideal and gives you room to grow. Double can be a bit too small to accommodate three people.

Fills larger spaces

King-size beds are the best option for large bedrooms because they fill the void, whereas double beds can look out of place due to their diminutive size. This is especially true when a bedroom has lots of stylish furniture.  

Cons of Upgrading to a King-Size Bed

Higher cost

King-size beds, mattresses, and bedding cost more than double-size products because they are bigger and use more materials. You will typically pay 20% more for a king-size product, which might not suit your budget.

Potentially too big

King-size beds can be too big for smaller bedrooms, making the room feel cramped or, at worst, they won’t fit at all. You should measure your bedroom to determine if it can take a bed over 150cm wide and 200cm long.

Extra bedding

If you already have double bedding and sheets, these are useless on a king-size bed, so there’s a chance you will have to throw them out if you can’t use them elsewhere. King-size bedding also takes up more space in storage.

Difficult to move around

King-size beds can be challenging to move around due to their size and weight, especially when they don’t sit on castor wheels or gliders. If manoeuvrability is essential, look at king-size beds on wheels or gliders, or buy a double.

Weighing everything up

Overall, the pros of king-size beds outweigh the cons.

Upgrading to a king-size bed might be the best thing for you if you are a couple searching for extra sleeping space or have a family.

The cost will be higher, and it might be too big for some bedrooms, but it is generally worth the investment. If you have limited space or a relatively new double mattress you love, you could always stick with what you have.

If a king-size bed is perfect for your lifestyle, check out our award-winning mattresses and our ultimate buyer’s guide to choosing a new mattress.   

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