How to Choose the Right Mattress Size for Your Bed

August 15, 2022 | Casper Editorial Team

There are three things every new mattress should have—plush, cloud-like softness, zoned support, and enough sleeping space to stretch out. 

Maybe you crave a sprawling cozy bed all your own with enough sleeping space to go full starfish. Or, perhaps your current Twin bed has been overtaken by furry companions, and you’re looking to upgrade for the sake of the family. Whether you plan to share your bed or keep it all for yourself, you’ll find the question of what size mattress should I get, an essential factor when considering your overall comfort.

If you’re looking for a blissful and spacious nightly retreat, this bed size guide will help you figure out how to choose a mattress size.

Factors to Consider 

As you compare mattress sizes, it’s essential to explore a few fundamentals, such as the type of sleeper you are, the amount of space in your bedroom, and if you’ll be sharing your dreamy sleep setup with a companion or two. 

What Type of Sleeper You Are

Just like a thumbprint, everybody’s sleep patterns are unique. As such, consider the following when shopping for your next best mattress:

  • Tossing and turning – Did you know fidgety sleepers often have vivid dreams? If your bed looks like you ran a marathon every morning, your athleticism is best accommodated by a bigger bed, like a king size bed. 
  • Sleep habits – Are you a night owl or an early riser? You’ll want a bed that complements your sleep habits. A chef who stays up into the wee hours of the night and shares a bed with their early-to-bed partner will appreciate a larger mattress like a California king mattress, as not to disturb their slumbering companion. 

How Much Space Is In Your Bedroom

Some bedrooms are made to house large King-sized mattresses spaciously, while another room size may barely fit a bunk bed or twin xl bed. To ensure you have a sleeping environment that’s comfortable and easily maneuverable, make room for a bit of planning:

  • Measure your room– Start by measuring the dimensions of your bedroom or guest room. Use a tape measure to ensure you get accurate numbers and jot them down so frenzied productivity won’t scramble your calculations. 
  • Design your space – Imagine a few options for bed placement and take accordant measurements. This gives you the flexibility of rearranging without guesswork.  
  • Consider storage – First do you need a bed frame? If you need under-bed storage, you’ll want to select a bed frame size with ample space below. Look for the mattress height dimensions and factor in whatever bed frame you’ll use. You’ll also want to confirm that you can comfortably fit bookshelves or bedside tables around the border of your bed. And if you’re fitting your guest room bed into a cozy corner, be sure your hand has room to reach down the gap for misplaced socks or other items that may get stuck there. 

Sleep Companions

Some sleepers love to cozy up next to their partners and furry friends for a night of snuggly sleep, while others prefer their own space. When buying your next mattress, consider how you sleep best and if you’ll be factoring in any sleep-time companions, like:

  • Pets – If you’ve got pets, you’ll want a bed where you can snuggle their little paws without inhaling whiskers all night. Base your mattress choice on where they like to sleep—for curling up at your feet, an extra long bed could do the trick, whereas a wider option like a Queen will satisfy side-sleepers. 
  • Partners – When it comes to partners, you’ll want to consider any regular company’s needs. If one party member snores, you might benefit from a reasonable distance between the two of you that’s provided by a wider bed. If you’re a fan of spooning, a narrower bed will keep you snug as bugs through the night. 
  • Children – Any children looking to play hide and seek, enjoy a nap, or simply jump up and down will appreciate a large bed. You may want to leave room for existing (or future) kiddos searching for snuggles in your own bed, too. 

No matter what your sleeping style is or how small or big your room is, Casper has a mattress in a size you need. Check out our variety of mattresses in 6 different mattress sizes from twin to California king.

Next Up, Review the Mattress Sizes

Once you’ve considered those factors, you can properly evaluate the different mattress sizes. Mattresses run the gamut of size options, from a cozy twin bed to a vast Cal king mattress. As such, before you choose your new mattress, you must acquaint yourself with their various dimensions and capabilities to ensure you’re getting the size mattress of your dreams:

  1. Twin Mattress – 38″ W x 75″ L x 11″ H; A twin mattress is perfect for growing kids or as a single guest bed.
  2. Twin XL Mattress– 38″ W x 80″ L x 11″ H; The classic twin xl mattress or American dorm bed features extra length for tall folks or for a single sleeper accompanied by pets at their feet. 
  1. Full Mattress – 53″ W x 75″ L x 11″ H; Essentially, two twin beds morphed into a comfy duo, full-size mattresses work for a single sleeper longing for extra space, or a couple keen to share. 
  1. Queen Size Mattress – 60″ W x 80″ L x 11″ H; As the name implies, a queen size mattress is made for regal lounging. 
  1. King Size Mattress – 76″ W x 80″ L x 11″ H; Ideal for bigger bedrooms, the king size bed offers couples or individuals with more than enough sprawling space. 
  1. California King Mattress – 72″ W x 84″ L x 11″ H; Nothing epitomizes luxury like a Cal king mattress, perfect for families who want to cuddle as much as they want their own space. 

For better sleep and award-winning mattresses that fits your needs, Casper is your go-to for any size. Our mattresses come in all six dimensions—and they’re dreamily cozy. 

Find the Perfect-Sized Mattress at Casper

Ultimately, choosing the right-sized mattress will depend on your sleep habits, room size, and sleeping companions. But, size shouldn’t be the only factor you consider when shopping for your next mattress.

At Casper, we engineer mattresses for ultimate comfort. In addition to our range of dimensions, our mattresses have ergonomic zoned support and breathable foam to keep you cool all night long. If you’re still unsure of which mattress type and size will best suit your needs, take our mattress quiz to find the perfect mattress for you and sleep soundly with Casper.