What’s the Right Mattress Size for You?

If you’ve decided it’s time for a new bed, there are a bunch of choices you will need to make, starting with the type of mattress: innerspringmemory foam, or latex? Do you prefer a plush or firm comfort level? And what size mattress is best?

While that last one seems like a simple question, it can be tricky to answer. There’s a lot that goes into selecting a mattress size. You have to think about the size of your room, the size of your body, whether or not you share the bed with a partner, and if you need extra space for kids and pets to cuddle up. Of course, you don’t want to choose a mattress that’s too small—but you also don’t want to pick one that’s too big for your bedroom either. So how do you determine which mattress size is just right?

Here’s a quick primer on mattress sizes and who each one is best for so that you can pick the right bed for you.



Size: 38 inches wide by 75 inches long

Minimum recommended room size: 7 feet by 10 feet

Who it’s best for: Twin is the smallest mattress size, making it the typical choice for a child’s first “grown-up” bed. For siblings in small bedrooms, twin beds can be stacked as bunk beds. (Here’s how to pick the best mattress for kids.) Because it’s only 75 inches long (which translates to 6 feet 2 inches), a twin size mattress may not be long enough for taller teens or adults. Assuming you do fit comfortably in a twin (also known as a single) bed, it can be a good choice if you live alone or in a tight space—or you don’t want to share a bed with your partner.


Twin XL

Size: 38 inches wide by 80 inches long

Minimum recommended room size: 7 feet by 10 feet

Who it’s best for: The twin XL mattress is a popular choice in dorm rooms because it’s five inches longer than a traditional twin size bed. If you’re comfortable with the width of a twin size mattress but your feet hang off, then a twin XL might be a good option for you. Twin XLs can also be placed side by side to form a king-size bed for couples who prefer different firmness options (see King below).



Size: 54 inches wide by 75 inches long

Minimum recommended room size: 10 feet by 10 feet

Who it’s best for: Also known as a double bed, a full mattress is 16 inches wider than a twin size bed. That being said, it’s the same length as a twin bed, so if you’re taller, it may not offer you enough sleep surface. A full size mattress can fit two smaller people comfortably, and it’s a good pick if you have a small bedroom. But if you and/or your sleep partner are on the larger side (or you have young children or pets who like to snuggle), then a full size bed may be too cozy.



Size: 60 inches wide by 80 inches long

Minimum recommended room size: 10 feet by 10 feet

Who it’s best for: This is the most popular mattress choice—and for good reason. If you tend to move from your back to your side to your stomach throughout the night, you’ll have plenty of room, whether you’re a single sleeper or you share a bed. You should also easily be able to fit kids and pets in a queen size mattress. (Here’s a case for letting dogs sleep in your bed.)



Size: 76 inches wide by 80 inches long

Minimum recommended room size: 10 feet by 12 feet

Who it’s best for: At 16 inches wider than a queen, a king size mattress is ideal for couples who want a generous amount of space. If you and your partner have different sleep styles, then consider getting two twin XLs and placing them side by side (this will equal the size of a king bed). Because it takes up so much space, keep in mind that you’ll have a lot less room for other furnishings. If you need help choosing between a queen and a king, here’s how to decide if a king size mattress is right for you.)


California king

Size: 72 inches wide by 84 inches long

Minimum recommended room size: 12 feet by 12 feet

Who it’s best for: If you or your partner is particularly tall, then a 7-foot-long California king bed may be your best option. It’s four inches narrower than a traditional king size bed, but four inches longer. Why is it called a California King you might ask? Explanations vary, but the most plausible is the connection with Hollywood “royalty” during the 1920s and ’30s.

For more help on finding your perfect bed, read our tips on choosing a mattress based on your sleep style.

Ready for a New Mattress? See What Saatva Has to Offer

Saatva Classic Innerspring

Our flagship luxury mattress is expertly engineered with coil-on-coil construction for durability, a layer of memory foam for enhanced back support, and a cushiony Euro pillow top for extra comfort.


Loom & Leaf Memory Foam

Premium memory foam, handcrafted in the U.S., with eco-friendly materials. Breathable organic cotton, cooling spinal gel, and layers of high-density support foam assure a cool, comfortable night’s sleep.


Zenhaven Latex Mattress

100% Talalay latex responds to every curve for pressure-free support and responsive comfort. Talalay latex is supple, resilient, and durable, for the ultimate in elevated sleep. (It’s naturally hypoallergenic too.)


Christina Heiser is the content manager at Saatva. She has held previous positions at Everyday Health, Women's Health, and L'Oréal. When she's not working, you can find Christina checking out the latest boutique fitness classes in New York City, cheering on her college basketball team (go Red Storm!), and trying new beauty and wellness trends.