King Single vs Double: Which Mattress Is Right for You?

Whether you’re setting up a new bedroom, upgrading from a childhood bed, or trying to make the most of a tight space, your choice of mattress size can make all the difference to your comfort and lifestyle. When it comes to solo sleepers, the two most popular options are the king single and the double mattress. 

Although they’re often mentioned in the same breath, these beds are built for very different types of snoozers. So, how do you choose between them?

Mattress Sizes: The Basics

What Is a King Single Mattress?

A king single mattress typically measures 105 cm in width by 203 cm in length. It’s longer than a standard single mattress and just wide enough to give solo sleepers a bit of room to stretch without encroaching on the rest of the bedroom. That extra length makes it a top choice for taller sleepers, while the narrower width helps conserve space in the room. 

Designed for growing bodies and taller individuals, king single mattresses are especially popular in children’s rooms, teen bedrooms, and smaller guest rooms.

They’re also a smart space-saving solution for studio apartments or shared living setups. And the best part? If you’re ready to buy a king single mattress, there’s a wide variety of styles,firmness levels, and materials available online.

What Is a Double Mattress?

A double mattress, on the other hand, measures around 138 cm wide by 188 cm long. It’s a step up from a king single, particularly for single sleepers who value extra space, or for couples with a smaller bedroom. 

It’s shorter in length, so it may not be ideal for very tall sleepers, but the extra width provides more wriggle room, making it an attractive option for guest bedrooms or as a cost-effective main bed. 

Keep in mind that a double can feel tight for two adults, especially if one is a restless sleeper.

How to Choose the Right One for Your Space and Needs

So now that you know the specs, how do you decide which mattress suits you best?

1. Consider Who’s Sleeping in It

If you’re shopping for a growing child or teenager, a king-size single is a fantastic option. The added length means it won’t be outgrown too quickly, and it’s compact enough to fit comfortably in smaller bedrooms.

For solo adults who appreciate a bit more width, a double mattress provides extra elbow room. It’s a better choice if you like to stretch out sideways, or if you occasionally have a partner or pet sharing the bed.

2. Think About Room Dimensions

Before making any purchase, grab a tape measure and assess your space. King single mattresses are ideal for tighter rooms, especially where floor space is a premium. They give you more room to move around, add furniture, or leave space for play.

A double mattress, on the other hand, needs a bit more breathing room. If your bedroom is large enough to comfortably fit the mattress, side tables, and walking space, go for it. Otherwise, you may end up feeling cramped.

3. Sleeping Style and Future Plans

Are you a light sleeper who stays mostly in one position? Or do you tend to roll around like you’re wrestling the covers? If it’s the latter, a double mattress might suit your movement better.

Planning also matters. If your child is about to hit a growth spurt, investing in a king single ensures long-term value. If you’re outfitting a guest room and want it to accommodate couples occasionally, a double may be more versatile.

4. Budget and Bedding

Let’s not forget the extras: bed frames, sheets, duvets and pillows. King single mattresses are often more budget-friendly, not just in the mattress itself but in the accessories too. However, double mattresses have the advantage of being more widely available bedding, often at competitive prices due to their popularity.

Mattress Maintenance: Keep Your Mattress Feeling Fresh

Buying a new mattress is an investment in better sleep, so it’s worth looking after. To keep your mattress in top shape, start by rotating it every three to six months. This helps prevent uneven wear and keeps it feeling supportive for longer.

Use a quality mattress protector to guard against spills, dust mites, and general grime. It’s much easier to wash a cover than clean the mattress itself! Don’t forget to vacuum the surface every so often to remove dust and allergens.

Let your mattress breathe by stripping it back occasionally and allowing fresh air to circulate. And if you move house, always transport your mattress flat to avoid internal damage.

With just a little regular care, your mattress can stay comfy, clean, and supportive for years. 

Conclusion

At the end of the day, choosing between a king single and a double mattress comes down to a balance of lifestyle, space, and future plans. Before you commit, take the time to measure your space, consider who’s using the bed, and think about your long-term needs. Whether you’re shopping for your child, a guest room, or your comfort, making the right mattress choice can transform your sleep quality and your home.