Last updated: 16/10/2022

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Today we’re going to talk about a mattress model that is ideal for those who do not give up a good space, the king mattress. Often found in hotel rooms, this product combines large dimensions and is a great choice for couples.

It is ideal for those who like a spacious and extremely comfortable bed. If you are looking for all this, you have come to the right place. Below, we show you more about the king mattress. By the end of the reading, you’ll know how to choose the ideal model for a good night’s sleep. Let’s go?


  • The king mattress is currently the largest among the mattress models, being made in regular and super king versions, which are even more spacious.
  • King mattresses can be purchased individually or in a set that comes with a box bed.
  • For having very large measures, this type of mattress is also the most expensive. However, those who do not give up sleeping in a spacious bed do not regret this purchase.

The Best King Mattress: Our Picks

There are king mattress versions that adapt to all weights and needs. They are made by the most varied manufacturers and we have separated below the models with the best reviews, check them out.

Buying and rating guide for king mattress

Anyone who sleeps with someone knows that there is nothing worse than leaning against each other during the night. This is a problem that many couples face and a great way to solve it is with a king mattress.

Very spacious, this is the largest model among all the mattresses. In the buying guide below you will know in depth everything about it, from its advantages, features and even the value. So, if you want to know more, stay with us.

Na foto uma mulher deitada em uma cama com uma bandeja de café da manhã em sua frente.

The king mattress is very spacious and comfortable. (Source: Toa Heftiba/ Unsplash)

What is a king mattress and how big is it?

In English, the word king means king, and it makes perfect sense that the largest mattress model has that name.

Basically, this product is like other mattresses, but it has the distinction of being the largest in its category to date.

Ideal for use with box beds, the king mattress is 1.86 metres wide and 1.98 metres long. There is also a variation of it that is even bigger and is called super king size. This version has nothing more, nothing less than 1.93 meters wide and 2.03 meters long.

Practically the only difference between the double, queen and king mattress models is the size they have.

The double mattresses are 1.38 metres wide and 1.88 metres long. The queen version is 1.58 metres wide and 1.98 metres long.

What are the advantages and disadvantages of the king mattress?

It is not for nothing that many hotels invest in king mattresses for the beds in their rooms. This is mainly because of their comfort.

Because of its larger size, this model of mattress guarantees very comfortable nights of sleep, without the sleeper sprawling on each other. Besides, for very tall people it is perfect.

This mattress model guarantees very comfortable nights’ sleep.

As it is a slightly more expensive mattress, it is also made with high quality raw materials. This way, it can guarantee a rest without pain and discomfort.

Another positive point of the king mattress is that the beds with it are larger and more imposing. Thanks to all this, they draw attention and add a lot to the decor of the room.

The disadvantage of this product is that it is not in any size of room that it will fit. Not to mention that its price is higher than other mattress models.

  • It has a great size
  • It guarantees very comfortable nights” sleep
  • It is made with quality raw materials
  • It prevents people from bumping into each other during the night
  • It adds to the decoration of the bedroom
  • It has a high value
  • It does not fit in small bedrooms

What are the types of king mattresses?

The king mattress can be made with two types of internal structure, springs or foam.

In the past, foam models were the most common, but nowadays this has changed a lot. This is because they have lost some of their space to the versions with springs, which are more comfortable and less rigid.

That said, you should know that the king mattress made with springs is composed of several parts that can be interconnected or individually bagged. When the product has interconnected springs if one side of the bed moves the other will also be rocked.

This does not happen with the king mattress with pocket springs. In it, each spring is individually wrapped, and no matter how much a person moves on one side, nothing will be felt on the other.

What care should one take with the king mattress?

Although in general, the king mattress has a great durability, it is necessary to take some care so that it remains intact for many years.

One of the main precautions with this kind of product is not to jump on it. This is a difficult task for those who have children at home, but if this happens frequently, the structure of the mattress can be damaged.

The sheets should be changed once a week. This way, the spread of fungus, dust mites and bacteria is reduced. Mattress protectors are also great allies for this.

Periodically, it is recommended to vacuum the entire surface of the mattress. This type of cleaning will help keep it free of dirt and unwanted microorganisms.

Finally, do not iron clothes on top of the king mattress. This applies especially to foam models, as the heat can damage them.

Purchase criteria: How to compare king mattress models

If you are looking for a great night’s sleep, know that the king mattress is ideal for this. But, to choose one of these it is essential to pay attention to some criteria and we show you all of them below.

Now we will explain everything about them.

King or super king

As we told you above, it is possible to buy a king mattress of regular size or a super king, which has bigger measures.

When choosing one of them, take into consideration the measurements of the room and also of the bed, in case you want to buy just the mattress.

Besides, it is worth considering that the difference in size between these versions is not very big. With that, not always the value to be paid more compensates.

Na foto um qualquer de casal com piso de madeira, janela e móveis.

All king mattress models are large and spacious. (Source: Francesca Tosolini/ Unsplash)


As much as the depth of a king size mattress does not directly interfere in its comfort, it should be taken into consideration. This feature makes a difference mainly in the aesthetics of the bedroom, due to the height of the headboard.

Therefore, know that the foam models can be between 12 and 25 centimetres high. The spring versions, on the other hand, have between 20 and 40 centimetres.

Therefore, check which of these measures best adapts to the headboard of your bed.

Density and capacity

Another point of attention when buying a king mattress is its density. This density refers to the amount of raw material used in its composition.

It is determined by the letter D followed by numbers. Thus, a D33 density mattress has 33kg of material per cubic meter of foam.

The most important thing about this is that this raw material is responsible for ensuring the weight that the mattress king can support. But, don’t think that means that a D33 model only supports 33kg, because this value is per cubic metre.

From this, check the table what is the ideal king mattress density for your weight.

Density Weight and height of the person
D23 Up to 50kg with a maximum height of 1.70 metres, or between 51 and 60kg with 1.71 and 1.80 metres
D26 Between 51 and 60kg with up to 1.70 metres in height and between 61 and 70kg with a height between 1.51 and 1.90 metres
D28 Ideal for 51 to 60kg with up to 1.50 metres in height, 71 to 80kg with 1.61 to 1.90 metres in height or 81 to 90kg with more than 1.90 metres in height
D33 From 71 to 80kg with height between 1.51 and 1.60 meters, 81 to 90kg with 1.61 to 1.80 meters and from 91 to 100kg measuring between 1.81 and 1.90 meters tall
D40 It serves to those who have between 91 and 100 kg and measure between 1.61 and 1.80 meters, 101 to 120 kg with height between 1.71 and 1.90 meters and 121 to 150 kg measuring more than 1.90 meters
D45 Ideal for people with 101 to 120 kg with height between 1.61 and 1.70 meters or 121 to 150 kg with height of 1.71 to 1.90 meters

Type of technology

Finally, it is worth analysing the type of technology used to make the mattress.

Speaking of the foam models, there are several types of this material. The agglomerated, for example, is the most used in lower value mattresses, which have lower quality and are more uncomfortable.

Memosense foam, on the other hand, is one of the best because it does not deform and is anti-allergenic.

As for the spring, remember that there are interconnected and bagged springs, which are the best option.

Besides, check if the mattress is anti-allergic and if it has other differentials that make it stand out.

(Featured image source: Chastity Cortijo/ Unsplash)