Mattress Size Matters: Finding The Best Mattress for Different Sleeping Positions

Updated on January 14th, 2024
Serena Carsley-Mann
Written by Serena Carsley-Mann

Sleep is essential for our well-being, and the right mattress (and size) can make or break that. With endless options out there, knowing where to start can be overwhelming. This guide will take you on a quick, but invaluable walk through the world of mattresses, focusing on the importance of choosing the right size for your specific sleeping style.

The Importance of Mattress Size

If there’s not enough space for you to move around comfortably throughout the night on your mattress, it won’t provide you the full benefits you deserve. This runs true even with the best, most expensive mattress. If you share the bed as well then you definitely want to make sure there’s enough space for all of you to sleep comfortably and well.

Here’s an overview of the different mattresses sizes, and who they’re best fit for.

Twin/Twin XL

This mattress size is ideal for children or single adults who are living in a relatively small, limited space. Twin mattresses measure 38 inches wide by 75 inches long, while Twin XL adds an extra 5 inches in length, making it 80 inches long.


This size is a step up from the Twin and Twin XL and is suitable for single sleepers who need a little more room while sleeping with more width to it. Full mattresses measure 54 inches wide by 75 inches long.


The Queen is the most popular size and is best for couples or those who really appreciate extra space. It provides ample space for two sleepers without taking up too much space in the house/bedroom. Queen mattresses measure 60 inches wide by 80 inches long.


A King-size mattress offers a luxurious amount of space and is perfect for couples who prefer to have personal space in bed. It can also be great for families who enjoy sleeping together. These measure 76 inches in width and 80 inches in length.

California King

The California King is the largest mattress size available and is both longer and narrower than standard king-size mattresses. These are ideal for taller people who need some extra legroom while sleeping. This size mattress measures 72 inches wide and 84 inches long.

Mattress Height: An Overlooked Aspect

Mattress height or thickness is another factor that’s often overlooked when mattress shopping. In general the height of a mattress can range from 8 to 14 inches. The thicker the mattress, the more support and cushioning it offers. This can be helpful for heavier people or those looking for a more plush sleeping experience.

Higher mattresses require deeper pocket sheets and can be more of challenge to get into and out of for certain people.

Matching Mattress Types to Sleeping Positions

No sleeper is created equal. We all have different sleeping positions, which is also why we all need different levels of support and firmness.

Here’s how to match your position to the right type of mattress:

Side Sleepers

Those who tend to sleep on their side require a mattress that contours to the body’s curves. At the same time, it should also provide sufficient support to avoid pressure points and align the spine. This means that in general a memory foam or hybrid mattress is best for side sleepers.

Back Sleepers

For sleepers that tend to lay on their backs, a medium-firm mattress is usually the best bet. It supports the natural curve of the spine.  Opt for a hybrid of innerspring mattress if you’re a back sleeper.

Stomach Sleepers

Stomach sleepers need a more firm mattress to keep their body aligned. They need to ensure their hips don’t sink too deeply into the mattress. As a stomach sleeper, you should go for a foam or innerspring mattress.

Combination Sleepers 

Combination sleeping means someone who moves around constantly throughout the night, or at least a lot. This means that they’ll need a responsive mattress that offers support and comfort. A hybrid mattress would be ideal for this type of sleeper.

Considerations for Specific Needs

Back Pain

If you suffer from back pain, you’ll need to go for a mattress that offers zoned support or extra lumbar support. It’s generally suggested to invest in a memory foam or hybrid mattress for their pressure-relieving properties for back pain.

Temperature Regualtion

Those who sleep hot should consider mattresses with cooling technologies such as gel-infused foam, breathable covers, and innerspring systems for better airflow.

Motion Isolation

If you share your bed with a partner or even a pet, a mattress with good motion isolation is important. Memory foam or pocketed coils can ensure that movements aren’t felt across the bed.

Additional Considerations

Trial Periods & Warranties

Look for mattresses that offer a trial period and a comprehensive warranty. Many of our top-rated brands offer trials as generous as 365 nights – allowing you to try out a mattress for an entire year before fully committing!

This gives you the chance to test it in your own home and ensures long-term satisfaction. With a warranty, it also guarantees that if any issues arise, you’re covered by the brand.

Budget Considerations

While it’s important to invest in a good mattress, there are quality mattresses for a wide variety of price points.

Online mattress brands (such as the ones we present) often offer luxury mattresses at more affordable prices due to lower overhead fees. As we mentioned earlier, even with the most expensive mattress, if it’s not the right fit for your needs it’s not worth it.

Room Size

You’ll also of course have to ensure that the mattress you choose fits in your bedroom comfortably. This means that you also have enough space to move around and access other parts of your room.


Choosing the right mattress, size, and type included is a personal decision. It depends on a variety of factors such as your sleep preferences, style, body style, and even overall lifestyle. By considering all these, you can find a mattress that allows you to not only sleep comfortably – but that can also enhance your overall sleep quality.

Serena Carsley-Mann avatar

Serena Carsley-Mann

Serena has been writing B2C and e-commerce content for the past 13 years. She's always excited to learn about new industries, and especially at the opportunity to write both informative and punny content for the ultimate user experience.

Top 5 Mattress
Advertiser Disclosure

This website is an informative comparison site that aims to offer its users find helpful information regarding the products and offers that will be suitable for their needs. We are able to maintain a free, high-quality service by receiving advertising fees from the brands and service providers we review on this website. These advertising fees, combined with our criteria and methodology, such as the conversion rates, our team of reviewer's finding and subjective experience and product popularity, impact the placement and position of the brands within the comparison table. In the event rating or scoring are assigned by us, they are based on the position in the comparison table, or according to other formula in the event specifically detailed by us. See our How we Rate page and Terms of Use for information. The reviews, rating and scoring are provided “as-is” without guaranties or warranties regarding the information contained in our website, which shall not be considered as endorsement. We make the best efforts to keep the information up-to-date, however, an offer’s terms might change at any time. We do not compare or include all service providers, brands and offers available in the market.

Contact Us

Our goal is to provide answers to all of your questions so you can make a confident purchasing decision. We welcome your feedback, so please email us at with suggestions and questions. We’d love to hear from you!

Your information will be handled as detailed in our Privacy Policy