What Size Bed Should a Teenager Have?

Good quality sleep is important for teenagers. It is essential to improve teenagers’ physical health, school performance, and brain function. 

With the right mattress, teens can get the sleep they need. There are many available mattresses on the market. So, you should choose the best bed for your teenager and know what size bed should a teenager have.

In this article, we will help you get the best bed size for teenagers. 

What Size Bed Should a Teenager Have?

The full mattress is considered the ideal size for teenagers since it provides enough space to stretch out. However, it is not overly spacious for an adult person.

If your teenager has a smaller bedroom that can’t accommodate a full mattress, a twin XL or twin mattress can be good. A teen may rarely require a mattress bigger than a full. 

The size of your teen’s mattress can depend on their room space and their body type. 

The following are some mattress sizes you can buy for your teens.

1. Twin XL

The twin XL size is 39”x 80”. It is 5 inches longer compared to the twin. It is ideal for taller teenagers who have average weight or below. 

2. Twin

This 39” x 75” mattress is the least spacious. It can be good if your teen is on the smaller side or has a small bedroom. 

3. Queen

The queen size is about 60” to 80”. It can be the best choice if you want to turn your teen’s mattress into a guest bed. It is also fine for adults. 

4. Full

The full mattress is 54” by 75”. It is wider than the twin mattress. It can still be useful even when your teen becomes an adult. 

5. King 

The king-size is 76” x 80”. This mattress is more common for couples than for teenagers. However, it can also be ideal if your teen is taller or heavier. 

6. California King 

The California King bed is 72” x 84”. It is not common for teens since it’s designed for couples in their master bedroom. 

However, it can also be a good option if your teen is tall and heavy. 

When it comes to the mattress size for your teens, you should choose based on your teen’s specific needs. 

Factors to consider in choosing the best bed size for teenagers 

Make sure to get the mattress that suits the specific needs of your teenager. You can consider the following tips.

1. Right size

The teenage years are the fastest growth stage in humans. You may discover that your child has outgrown their old mattress. 

In this case, you should find a new mattress that can fit the size of your teenager. Most common bed sizes for teens include full, twin XL, or even queen. 

2. Firmness 

It is crucial to choose the right firmness while buying a mattress for your teen.  It needs to be firm to support their shoulder, spine, hips, legs, and neck. 

The bed should also be comfortable and soft to avoid joint pain. Adaptive foam, memory foam, latex, hybrid, and airbeds are good for maintaining better spinal posture while sleeping. 

3. Relieve pain 

While growing, young teens may experience muscular pain, especially around their knees, calves, and thighs. Muscular pain at night can be common for teenagers who have lots of outdoor activities. 

So, you can invest in a hybrid mattress or a bed made from latex and memory foam. These beds are known to soothe sore muscles and relieve pressure points. 

4. Heat regulation

Keeping optimal bedroom temperature is essential for sleep hygiene. Moreover, heat regulation is also critical to mattresses. 

Although some mattresses for teenagers are comfortable, they may not correctly regulate heat. It can cause uneasiness during sleep. So, you can prefer beds with excellent breathability. 

Luckily, most beds come with adaptive foam, which is beneficial for temperature regulation. Some mattresses have an additional layer of ceramic gel beads or graphite. 

5. Thickness 

Mattresses come in different thicknesses. The ideal thickness for adolescents is 10 inches. The mattress thickness for the plus-size teen can increase by another 2 to 3 inches. 

If you don’t get the proper thickness for your teen’s bed, it may reduce durability. If your teen is more than 230 pounds, it may not offer optimal comfort. 

The recommended thinnest mattress for teens is 6-inch thickness. 

6. Sleeping position

You should also consider the sleeping position of your teen while choosing their mattress. If your teen sleeps on the side, the arms may bear the body weight, so they may need additional softness from the bed. 

On the other hand, back sleepers don’t need this cushioning. A stiffer bed can be good for the spine; making a moderate firmness is best for them.

Stomach sleepers may need a firmer bed to support their spine. Similar firmness is good for heavier teenagers to avoid sinking during sleep.

7. Let them move 

If your teen experiences a constricting feeling as they sleep, it can cause interruption. With this, you should consider the ease of movement that the mattress can offer. 

Mattresses which bounce and come with increased responsiveness are excellent for offering freedom to move while sleeping. 

8. Strong edges 

Although many new mattresses seem firm, they will begin to sag around the edges over time, especially due to regular use. So, it is better to buy a mattress for teens reinforced around the edges. 

You can prefer innerspring, latex, and hybrid mattresses if you want edge support. 

How to maintain a teenager mattress? 

The maintenance of your teenager’s mattress is essential for quality sleep. You can use a mattress protector to avoid mites, dust, and liquids from ruining and penetrating the materials of the mattress. 

It is also necessary to wash the sheets regularly. You can also rotate the mattress after a few months. 


Choosing the best size bed for your teenager can be challenging. There are many factors you need to consider in buying a mattress for your teenager. 

Meanwhile, as we mentioned earlier, the full mattress is ideal for teens. It can offer enough space to stretch out. For more buying guides, click here.

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