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Mattress Sizes: The Ultimate Guide to Choosing the Best Bed Size for You

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Expertise Certified Sleep Science Coach, Certified Stress Management Coach, Bachelor of English.

You have your pick between a range of mattress sizes, from a single-person twin-sized bed (for when your kid is too big for a crib) to an extra-wide California king fit (for couples who like to sprawl). The mattress size you choose will depend on your height, weight and preferences. In this mattress sizing guide, we explore the dimensions of each bed size, from the most common to custom-made options.

38 by 75 inches (96.5 by 190.5 centimeters)

A twin size is best for children, or single sleepers who want to maximize the space in their room. Because they take up very little space, they can fit in room sizes as small as 7 by 9 feet. Twin-size mattresses are popular for kids because it’s the least expensive size you can buy, and the bed won’t take up as much space in their bedroom, leaving them room to play.

Twin XL is a long twin mattress and is best for taller children, young adults in college, or single-sleeping adults who need extra legroom. An 8- by 10-foot room is the smallest you should go to fit a twin XL mattress comfortably. It’s also common for brands to have two twin XL mattresses as a split king. Keep in mind that it’s harder to find bedding to fit a twin XL mattress because the size is most commonly used in college dorms. That means you can usually find plenty of twin XL bedding during back-to-school season. Outside of that, you might be limited in what you can buy.

53 by 75 inches (134.5 by 190.5 cm)

Because full-size mattresses are bigger than a twin but cheaper than a queen, they’re popular for young adults or couples who don’t mind cuddling to maximize the space in their bedroom. The recommended room size for a full-size mattress is at least 10 by 10 feet.

Queen-size mattresses are best for single sleepers who enjoy their space. They’re also good for couples, just as long as nobody is over 6 feet and 5 inches. It’s currently the most popular mattress size in North America. The recommended room size for a queen-size mattress is at least 10 by 11 feet.

A common choice for couples with kids or single-sleepers who like extra space to spread out, the recommended room size for a king mattress is at least 12 by 12 feet. A larger size bed comes at a higher cost, both for the mattress and the bedding, so keep that in mind if you are on a budget.

A California king is longer than a standard king, but not quite as wide. It’s best for tall single-sleepers or couples who have pets who sleep on the bottom of your mattress.

Read more: Best California King Mattress

Maybe the mattress sizes listed above don’t suit what you’re looking for. Instead, you want something that fits between that one random nook in your bedroom, or an extra-oversized mattress so your big family can join together for movie nights. Here are the less common mattress sizes that are also available with some mattress companies.

66 by 80 inches

An Olympic queen mattress is slightly wider than a normal queen mattress. That extra six inches of space can be helpful for those who sleep with a partner or a pet. Keep in mind that most queen sheets might not fit an Olympic queen bed. Look for oversized bedding.

54 by 80 inches

A good compromise between a full and a queen size is a full XL. It offers the same width as a full mattress but is just as long as a queen. Single-sleeping adults who need the extra leg and or pet space typically would be well-off on a full XL bed. Keep in mind, it will be a little harder to find bedding for a full XL mattress than a full or queen.

27.25 by 51 inches

Crib mattresses are made specifically for your baby’s crib. These mattresses are about 6 feet by 4 feet and are firm (the firmer, the better) to fully support a baby’s body from sinking too far into the bed. When shopping for a crib mattress, you can choose between a foam and an innerspring bed.

Read more: Best Crib Mattress

Selecting the right mattress size is essential for a good night’s rest. Keep these things in mind when shopping for a new mattress.

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