Forever warranty
If you’re used to sleeping on a single or double mattress, before purchasing a king-size mattress you might have to consider some logistical factors. For example, you’ll have to invest in a new bed frame to accommodate a larger mattress. Despite this increased cost upfront, there are plenty of long-term benefits and perks of buying a king mattress too.
How Big Are King Size Mattresses?
One of the first things to take into account when looking at purchasing a king mattress is the size, as this will really affect your entire decision. A king mattress is usually fit for a king, so the standard size will typically stretch to 76 x 80 (W x L) inches.
Since this is much bigger than a standard double bed, you need to consider the amount of floor space you have available. You should also keep in mind the rest of the bedroom furniture, as this may need to be rearranged to make space for your new bed. If you live with your partner, then you should also check there’s enough space in the room to move around freely, so it doesn’t take over the bedroom.
If you’re planning to move into a new house, then this is the ideal opportunity to map out and manage your bedroom space from scratch. So, if you mark out where the king-size mattress would go, then you can work out the available floor space you have left. You can also use these markings to help plan any additional bedroom furniture you’re hoping to buy.
Recommended Mattresses
These are some of the most recommended mattresses that are available in king size:
When Should You Consider Investing in a King Size Mattress?
There are a number of good reasons to consider purchasing a king size mattress. These are some of the most popular motivations behind choosing a larger mattress:
1. You’re looking for more space – The main perk of owning a king bed mattress is that you can enjoy the sheer luxury of so much extra space. If you’re used to a double bed, a king size will finally give you the chance to sprawl without restriction. You can stretch your arms and legs as much as your heart desires. Having so much extra leg-room and elbow room will allow you to have a more comfortable and better-quality sleep too.
2. You’re a restless sleeper – If you’re a restless sleeper, or naturally twist and turn in your sleep, then you might find a double bed constraining. Occasionally, your arms or feet might dangle over the edge of the bed, or you might even fall off completely! So, this is where king bed mattresses can come to the rescue, as there’s enough room to move as freely as heart desires and sleep in any position you feel like. You also won’t bother your partner so much as there’s more than enough room for everyone.
3. You have a health condition – If you suffer from a health condition like joint pains or arthritis, then it might be hard to sleep the whole night in one position. So, the king mattress offers a more spacious option.
4. You have a family – If you have a growing family or you adore curling up in bed with your pets, then a king-size mattress is the perfect place for everyone to chill. You can all snuggle and relax, on a lazy Sunday morning, or binge-watch movies together in the comfort of one exceptionally large and comfortable bed.
Our top picks for April 2025
9.9
9.9
Memory Foam
King Mattresses vs California King Mattresses
When you’re shopping for a king-size mattress, you’ll find that you also have the option to look for a California king mattress size. The difference between California king mattresses and king mattress is the size. The California king mattresses size is usually 72 inches wide by 84 inches long. This means cal king mattresses size is four inches longer than the king mattress size, which is great for taller people. It is also one of the most expansive beds you can find, but many people find the heftier price of california king worth it for the added size.
Cal king mattresses are therefore a perfect choice if you’re looking for that added extra comfort and space. The price of the cal king and king mattress is usually the same too. The only downside to the calfornia king mattress size is that you might have to invest in a larger bed frame, new sheets, and covers. However, if you’re upgrading to a completely new sized mattress, then this would be the case anyway.
Check Price
More details
Comfortable for all average-weight sleeper types
Classic memory foam feel, with deep sinkage and contouring
365-Day sleep trial and warranty
Free shipping and delivery
Absorbs motion, making it ideal for couples
Stomach sleepers might not get the best support
Doesn’t support sleepers over 250 pounds
More details
Great for back- and side sleepers
Suitable for couples & heavier builds
Premium edge support for people with limited mobility
365-night trial
Lifetime defect warranty
Combines comfort & support
Limited sinking
Heavy & difficult to move
More details
High-quality, USA-based manufacturing
Customizable firmness
CertiPUR-US certified foam
Industry-leading warranty terms
Exceptional point-pressure relief
Luxurious, supportive pillow-top cover
Superb edge support
Not a bed-in-a-box service
Not the cheapest option
Types of King Size Mattresses
As soon as you’ve decided between a king mattress or a California king mattress, then the next step is to choose the type of best king mattress to suit your needs. There are a few mattress types to choose from, and we have included some recommendations for you to take into consideration.
Memory Foam King Mattresses
Memory foam mattresses are a good option if you’re looking for a comfortable king mattress that can support every kind of sleep position. The foam will contour to the shape of your body. Foam mattresses are also ideal as they provide targeted support to any injured areas and they can help relieve pressure points. This type of mattress will hug your body more, so it will have less bounce than other styles. These king mattresses usually aren’t as firm as innerspring king mattresses, but are the best king mattress for those seeking a plusher style.
The Nectar memory foam king mattress offers a few layers of support to find the right balance of softness and firmness. It also features a cooling gel foam layer, to enhance airflow and breathability. A king mattress and a California king mattress from Nectar usually costs $1,398. They also have special offers. The current offer for the king mattress sale and the California king mattresses sale is $999.
Latex King Mattresses
If you’re on the lookout for a natural and sustainably sourced alternative to foam, then latex would be an ideal option. The latex material has numerous benefits, including being naturally antibacterial and naturally hypoallergenic. It can also offer a similar, comfortable and snug sensation as memory foam. If you’re eco-conscious, these mattresses are a great choice, but they are sometimes pricier than other options.
If you decide on this type of king mattress, then PlushBeds offers natural latex mattresses. The regular price for a latex king-size mattress and a latex California size mattress is $2,899. They also regularly have special deals. The current offer for the king-size mattress and the California size mattress is $1,699.
Hybrid King Mattresses
With a Hybrid king-size mattress, you can get the best of both worlds. These mattresses are typically formed with layers of memory foam and gel foam for enhanced airflow, cooling, and pressure relief and coil springs for added support and lift.
These are the best king mattresses for those seeking the size, comfort and added support as it combines the cooling and airflow of foam with the support and firmness of springs.
Luxury King Mattresses
If you’re looking to upgrade to a king-size mattress, then it makes sense that you’ll want a luxurious sleeping experience. So, a luxury king mattress will offer all that and more. Luxury mattresses feature premium-quality materials for comfort and durability. Many also offer a hybrid combination of advanced coil and foam technology. Plus, luxury mattresses usually come with either a pillow top or a Euro top surface, for a smooth and luxurious feel and extra cushioned comfort.
Saatva offers a range of luxury king-size mattresses. Their flagship classic mattress is a luxury hybrid innerspring mattress, which has been approved by chiropractors for its comfortability, support, and durability. The king-size mattress and California mattress costs $1,599.
Conclusion
When choosing the best king size mattress for you, there are many factors to consider. First, of course, is to keep in mind what size are king size mattresses and whether they can fit in your home. If you’re looking for a spacious and comfortable place to rest your head, then a king-size mattress is a worthy investment. These mattresses are ideal for people who love to sprawl out and sleep in a range of positions. Another benefit is that they are perfect for those with families or pets. The main downside is that you’ll have to ensure you have enough space. The best advice is to do some research before you make your decision, and you can explore our reviews and recommendations for more information.
